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ApplePi-Baker v2 – Backup & Restore SD cards, USB drives, etc.

ApplePi-Baker v2 – Backup & Restore SD cards, USB drives, etc.

ApplePi-Baker has become well known amongst Raspberry Pi users, with a Mac running macOS, to backup and restore SD-cards. Users do not just use ApplePi-Baker for this purpose anymore – I have seen users use it for backup and restore of pretty much anything not Raspberry Pi related.

Late 2013, I created ApplePi-Baker for my own use – I just got tired of looking up the proper command-line statements.
This way, ApplePi-Baker became my personal frontend for command-line tools like “dd“, “diskutil“, “mount” etc.

Over time, the use of command-line tools came with some problems; thanks Apple for changing command-line tool output with every new version of macOS. Besides that, having to enter your “sudo” password each time was a pain as well, and came with the occasional problems for a small group of users, so that had to go as well.

About 2 years ago I decided to rebuild ApplePi-Baker from scratch, no longer using any of the command-line tools. This came with quite a few challenges, especially since Apple increased security for macOS, not allowing me to do certain things straight from my program (see also SMJobBless: Elevated Privileges in Lazarus Pascal). I’m not even mentioning the drama when it comes to supporting the different compression formats, signing applications, and 64-bit requirements.

Almost 2 years later, I proudly present ApplePi-Baker v2. – special thanks to Jeff and Mark for testing!


What is ApplePi-Baker? (optional)

This chapter gives you a background on certain aspects of ApplePi-Baker, which may or may not be an interesting read.

You can skip this chapter if you’re not all that interested in these details and go straight to “Installing ApplePi-Baker“.

ApplePi-Baker is a small macOS utility that allows you to backup or restore disks.
At its core, it uses the same format as produced by “dd“, a raw byte-by-byte copy of the disk – typically with the “.IMG” file extension.

As I mentioned; IMG file format is a raw copy of every single byte of the source disk, and nothing fancy is being done with it.
This also means that if your disk is 32Gb, even though you may be using only 1 byte, your backup file will still be 32Gb!

Note : For backup and restore, ApplePi-Baker only supports nonsystem disks.

You cannot make a backup of your macOS system disk.

Note : ApplePi-Baker does not shrink (or expand) partitions.

Since macOS, oddly enough, does not natively support any of the Linux Extended File Systems (ext), we do not have the means to easily determine what part of the disk actually is useful and what part is not. Several methods can be found to shrink the IMG file, but none of them can be used with macOS.

Note : Some folks use the “.DD” extension instead of the “.IMG” extension.

The file format is the same though (not to be confused with the old “DiskDoubler” file format).

Archiving and Compression with ApplePi-Baker

Typically, the IMG file format is very well compressible.
Commonly the “.zip” and “.tar.gz” (or “.tgz”) compression methods are being used on the resulting IMG file to reduce the needed storage space for the backup. I should mention that the format “.tar.xz” (or: “.txz”) is gaining popularity.

Maybe I should explain the difference between archiving and compressing (I had to learn this myself as well) …

An Archive is basically the bundling of a collection of files, which could be just one file as well – there is no compression involved.

Compression on the other hand, is the technique to store data in a smaller size than the original data, but does not involve building an archive – it just grabs one single file (chunk of data) and tries to store it in a smaller file.

Formats like 7Zip, Zip and Rar combine the creation of an Archive, and after that the Compression of that archive.

Formats like BZip2, GZip, LZip, and XZ, are good compression methods, but do not create an archive.
With these compression methods, one typically uses “Tar” to create an archive first before compressing said archive.

ApplePi-Baker Supported Formats

ApplePi-Baker support quite a range of file formats, in part due to libarchive that is being used.
Basically, anything libarchive can read or write, ApplePi-Baker can as well.

In ApplePi-Baker however, I have limited the formats used for creating a backup intentionally, to avoid odd-ball formats that are not supported by other tools or could be used in an incorrect way (like using GZip without TAR).

Formats supported for making a Backup

ApplePi-Baker supports the following formats (selected in the Save dialog when creating a backup). The extension is based on the commonly used extension for the selected format;

  • 7Zip (extension: .7z)
  • IMG (extension: .img)
  • Tar BZip2 (extension: .tbz)
  • Tar GZip (extension: .tgz)
  • Tar LZip (extension: .tlz)
  • Tar XZ (extension: .txz)
  • Zip (extension: .zip)

Formats supported for doing a Restore

There is quite a variation out there when it comes to file formats for backups. I’ve tried to capture them all, even ones that are not commonly used. Feel free to post a comment below if a format is missing, and I will see what I can do to add this odd format.

  • 7Zip (extension: .7z, .7zip)
  • BZip (extension: .bz,. bz2, .bzip) *1
  • GZip (extension: .gz, .gzip) *1
  • IMG (extension: .img, .dd, .raw, .dump)
  • ISO (extension: .iso) *2
  • Jar (extension: .jar)
  • LZip (extension: .lzip) *1
  • Rar (extension: .rar) *3
  • Tar (extension: .tar)
  • Tar BZip2 (extension: .tbz, .tbz2,, .tar.bzip, .tar.bz2, .tar.bzip2)
  • Tar GZip (extension: .tgz, .tar.gz, .tar.gzip)
  • Tar LZip (extension: .tlz, .tar.lzip, .tar.lz)
  • Tar XZ (extension .txz, .tar.xz)
  • XZ (extension: .xz) *1
  • Zip (extension: .zip)


Notes :

*1 : These files were not created entirely correct, as they are compressed, but not archived (tar).
*2 : Be careful with ISO files, you may end up with unexpected results – see below.
*3 : Only Rar < v5 are supported (a libarchive limitation).

Some notes on File Formats

Always use TAR when using BZip2, GZip, Lzip or XZ.

(ApplePi-Baker uses TAR automatically)

One can use these compression techniques without using TAR, however, the size of the file will often not be stored in the compressed file as such. To determine what the uncompressed size will be, one often must fully decompress the file first, just to see “what came out”.

Since ApplePi-Baker (and the user) would like to know if the uncompressed data fits on their target disk, decompressing the file first would take extra time.

However; ApplePi-Baker does support files that were created without using TAR. Mostly because I made the same mistake in the past as well. But be prepared to wait a little longer when restoring a file to a disk.

Potential unexpected results with ISO files.

(Can only be used with Restore)

ApplePi-Baker basically handles almost (!) any file format you throw at it for a restore.
This implies that you can even use a so called ISO file to do a restore.

Be warned though, that ApplePi-Baker was not designed to write ISO files to (for example) a USB disk, but libarchive does support it.
By lack of testing material, I can only say: this may or may not work as expected. Please post findings in the comment section!

About Mount, Unmount and Eject

A few things you may need to know involve mounting, unmounting and ejecting disks.

Different States

Under macOS, your disk/partition can be in one of several different “states“;

  • Mounted means that a disk or partition is “ready to use and visible to the end user”.
  • Unmounted means that the system knows the disk or partition exists.
    The end-user however, cannot see or use the partition from the Finder (but can see it in “Disk Utility”).
  • Ejected a disk involves the process of physically removing a disk.
    Back in the CD/DVD days, this actually meant opening the disk tray, so the user could grab the CD or DVD. Today, for example, this means that the user can unplug a USB drive. Once a disk is”ejected”, the user and the system can no longer access the disk.

Inserting a Disk

When the user inserts a drive, a CD/DVD/BluRay, plugs in an SD-Card, or a USB stick, the system will examine the disk and will try to automatically “mount” it so the user can access the disk right away.

Obviously, this mounting can fail, and a message may state that the disk needs to be initialized – common when you have an unsupported file system, like the Linux Extended File System (not uncommon for Raspberry Pi users), on that particular disk.

Disk Change notifications

macOS has a very nice, even though complicated at times, mechanism to report one of these events to your application.

Back in the day, you’d just check and see what changed every so many seconds -adding sometimes quite a workload to your computer.
But with Apple’s Disk Arbitration, this is no longer needed, and ApplePi-Baker fully uses these capabilities, minimizing the load on your computer’s resources. You’ll notice that ApplePi-Baker picks up on disk changes pretty fast.

Writing to a Disk – Sudo Access vs Helper Tool

Note : With “writing to disk” I actually mean the process of completely erasing and overwriting an entire disk as done during a restore.

The old way: Direct or as SUDO

Back in the day, your application could just write to a disk as it pleased. Obviously a tiny bit of a security problem – malicious applications or scripts would be able to destroy anything it felt like on your disk.

To minimize the chance that this would happen, so called “sudo access” (admin access) became needed to write in such a way to your disks. In the old (1.x) version of ApplePi-Baker this was still done. The command-line tools (like “dd”) were called with sudo access rights.

This came with a lot of issues and inconveniences.
Each time you started ApplePi-Baker, you would have to enter you sudo password.
Other tools still do this, either at the beginning or when executing the write task.

The new way: Helper Tool

Apple improved its security by going a different route – the so called “Privileged Helper Tool“.

This Helper Tool is a small program, designed for one single and very specific task, and is started by launchd to execute this task when the “main” application asks it to execute for that specific task (writing to disk).
See my article on SMJobBless: Elevated Privileges in Lazarus Pascal for more technical details, if you’re interested.

However … to keep things secure, this small program will need to meet several criteria that must be met before it can even be used.

Helper Tool: Security

Before we can use a Helper Tool, the “main” application needs to have defined that this Helper Tool exists and what criteria need to be met (for example: the Helper tool needs to be signed by a particular developer – that would be me).
The Helper Tool needs to have defined what application(s) are allowed to call for it (with similar criteria).

After that, both applications need to be signed – theoretically, the user, or malicious software, can no longer changes this.

By the way; The signed result of the Helper tool is after that, no longer a simple executable file – only “launchd” can start the Helper tool!

Before the main application can use this Helper tool, the Helper tool needs to be installed (in /Library/PrivilegedHelperTools/ ) and only “launchd” can do this. For this the user needs to explicitly give permission. So without the “OK” of the user, the Helper Tool will NOT be installed (and ApplePi-Baker will NOT work).

Once installed, the user will no longer need to provide a password to use the Helper Tool.

Note : ApplePi-Baker will install the Helper Tool at first run, or after you updated ApplePi-Baker to a version of ApplePi-Baker, that came with a newer version of the Helper Tool. So at first run only, you will see the message that ApplePi-Baker wants to install a Helper Tool, for which you will need to give permission.

Installing ApplePi-Baker

Before we can get started, we obviously will need to download an install ApplePi-Baker.

After downloading the DMG file, simply double click the DMG file, and drag “ApplePi-Baker” to your “Applications” folder.

Download ApplePi-Baker

  I have created a shortcut to the download for those wanting to use this in formulas (like brew etc) or link from their website.
– The direct download link to the latest version will always be
– And a shorter link to this article:

Please like ApplePi-Baker at … 

DOWNLOAD - ApplePi-Baker V2 

Platform: Mac OS X
Filename: ApplePi-Baker-v2.0.0.dmg
Version: 2.0.0
Size: 4.1 MiB
Date: May 12, 2019
 Download Now 

First Run of ApplePi-Baker

The first time you start ApplePi-Baker (recommended to run ApplePi-Baker from you “Applications” folder!), it will display a message, asking you to install the Helper Tool.

ApplePi-Baker - Install Helper Tool

ApplePi-Baker – Install Helper Tool

The Helper tool will be installed, by launchd, in /Library/PrivilegedHelperTools/.

The purposes of the Helper Tool is to read or write a disk directly (where in the past the so called “sudo” password was needed).

After installation, you will not need your admin password anymore, not even when in the future when you start ApplePi-Baker again. Your password by the way is not stored anywhere. This request is fully handled by macOS and ApplePi-Baker has nothing to do with it.

The only time a password will be asked is to install or update the Helper Tool.
Installation of the Helper Tool takes place when it is missing or when it needs to update an existing Helper Tool.

Theme Support

With the arrival of official “Dark Theme” support in macOS 10.1 (mojave), we can now use this for ApplePi-Baker as well.
Support for macOS older than Mojave may vary – if possible I do recommend upgrading to the latest macOS version anyway, but I do realize that not all Macs are supported with the latest and greatest macOS.

By default, ApplePi-Baker uses the Theme set by the system (Use System Theme).

You can however force ApplePi-Baker to use the classic Light Theme (Aqua) or the newer Dark Theme.

The setting for this can be found in the ApplePi-Baker menu.

ApplePi-Baker - Theme Settings

ApplePi-Baker – Theme Settings

ApplePi-Baker - Light vs Dark Theme

ApplePi-Baker – Light vs Dark Theme

Uninstall ApplePi-Baker

I’ll be the first one to say that I want to keep my Mac as clean as possible, and not every program is constantly needed or even the way you’d wanted the program to be. So here the details on Installing/Removing ApplePi-Baker;

  1. Drag ‘ApplePi-Baker” from “Applications” to the Trash, and empty the Trash after that.
  2. Delete the Preferences directory /Users/<yourusername>/Library/Preferences/ApplePi-Baker.
  3. And finally delete the Helper Tool in Finder (or Terminal): /Library/PrivilegedHelperTools/com.tweaking4all.ApplePiBakerHelper

Basic Tasks

In this chapter, I’ll go through of the basic tasks one would go through creating a backup or doing a restore.
The next chapter will show some of the additional functions you can find in ApplePi-Baker.

One thing to keep in mind; the window has been divided in 3 vertical parts; Select Disk, Backup and Restore.
The general idea is:

  • Select a Disk
  • Choose an Action (backup or restore)
  • Based on the chosen action; select a file
  • Wait for completion of the task at hand

Step 1A – Select a Disk

Click in the leftmost column on the “Select a disk” text or the hard drive icon.
A popup menu will appear, listing the available supported disks.

If no disks are listed, then there are no suitable drives for backup or restore found.
Remember: the system disk(s) are NOT supported.

ApplePi-Baker -Select a Disk

ApplePi-Baker -Select a Disk

After a disk has been selected, the selected disk will be listed under the icon, like show below in figure 5.
The red little “x” can be used to remove the selected disk.

Selected Disk listed

Selected Disk listed

Step 1B – Selecting Multiple Disks (Restore Only!)

Since ApplePi-Baker now supports writing to multiple disk – for Restore Only – you can click on the disk icon again and add more disks.

When using multiple disks, disks will be written to in sequence, kind-a like so:
– Read a block from the source, write that block to disk 1, write that block to disk 2,
– Again, read a block from the source, write that block to disk 1, write that block to disk 2,
– And again, read another new block from the source, write that block to disk 1, write that block to disk 2,
– etc.

Note :
– You can add a disk only once of course,…
– The selected disks will be listed in alphabetical order, not matter in what order you added them.

Selected Multiple Disks

Selected Multiple Disks

Step 2 – Backup or Restore

In this next step, you can select what you’d like to do: Make a Backup, or Do a Restore.
Again: click on the icon of the action you’re looking for.

Note :
– When selecting a “Read-Only” disk, then you can only make a Backup – the “Restore” option will remain grayed out.
– If you selected more than one disk, then you can only do a Restore – the “Backup” option will be grayed out.
– Naturally, if you did both (read-only and multiple disks), then neither Backup or Restore will be available.

Warning :
Not all SD-card readers seem to honor the “Read-Only” lock found on older SD cards.
In that case, your Mac will see it as a device it can write to – and actually WILL write to in case you selected a restore!

Based on your selection, a file dialog will open.

Backup: Here you determine where to store the file and in what format (selector at the bottom, center).
Restore: Here you can select the file you’d like to use for Restore. The format requirements will be detected automatically. Incase an archive has multiple files, you will be presented a dialog allowing you to select the file (in the Archive) that you wish to use.

For TBZ, TGZ, TLZ and TXZ files, by default “Find First File in Archive” mode is enabled. This means that ApplePi-Baker will grab the first file it finds.
This makes using these files a lot faster, but can be problematic when an archive contains more than one file. See “Enable Full Archive Seek Mode” for more details.

Step 3 – Coffee and a cookie

In this step you’ll just have to wait for the task to complete.

ApplePi-Baker also shows a percentage indicator on it’s Dock icon, and when the process has been completed (and ApplePi-Baker does not have focus) the dock icon will bounce (as expected with regular macOS applications).

Dock Icon show Progress

Dock Icon show Progress

In the ApplePi-Baker window, a few estimates will be displayed as well:

  • Average speed, which of course can change over time, but compared to the older ApplePi-Baker I have seen matching or better speeds.
  • Estimated completion time, which indicates at what time ApplePi-Baker expects to finish the job.
  • Time Left, which tells you how many hours, minutes, and/or seconds the process still will take.

The big “ Abort” button, well … it’s there just for decoration. Haha, just kidding. Obviously it’s there to abort a job.

Easy to read Progress

Easy to read Progress

Additional Functions and Options

Obviously, since this is a little bit of a hobby project, things went a little out of control, and while exploring things, I have added some functions I’d figured to be useful.

At the bottom of the window, you will see a few icons. “Functions” on the left and “Options” on the right.

ApplePi-Baker Functions and Options
Icon Purpose
ApplePi-Baker - Advanced Disk Panel Advanced Disk Panel
Reveals more details about the disks connected to your Mac and offers additional disk functions, like mount, unmount, create NOOBs, etc. – more about this below.
ApplePi-Baker - Website Help Go to
This icon opens this particular page – in case you need help.
ApplePi-Baker - About About ApplePi-Baker
Here you’ll find version information and credits.
ApplePi-Baker - show Log Window Show Log-Window
Opens a small log window below ApplePi-Baker with messages. Personally I prefer this over notifications, and I can see what happened while i was not paying attention.
Select FirstFile Mode Enable Full Archive Seek Mode
This is specific for Tar BZip, Tar GZip, Tar LZip and Tar XZ archives, and affects only these formats. See explanation below.
ApplePi-Baker - Auto Eject Auto Eject
When enabled, your disk(s) will be ejected after Restore completion.
(where Eject = Unmount all partitions and Eject disk)
ApplePi-Baker - Enable SSH Enable SSH
This tries to enable SSH on Raspberry Pi images, by saving a file “ssh” on the first mounted partition. This effectively enables SSH, ideal for a headless Raspberry Pi setup.
Note : your Raspberry Pi images has to support this for this to actually enable SSH.
ApplePi-Baker - Enable Notifications Notifications
When enable, notifications will be displayed in the macOS notifications. Quite annoying actually.

Enable Full Archive Seek Mode

This is ONLY for Tar BZip, Tar GZip, Tar LZip and Tar XZ archives, and affects only these formats!

For TBZ, TGZ, TLZ and TXZ files, Apple-Pi Baker will have to seek through the entire archive to find all entries, which can be slow process.
Since the first entry is found instantly, and since these archives typically have only on file entry, ApplePi-Baker by default grabs the first file entry it finds.

Under normal circumstances this should not be a problem.

However, if the archive contains more than one file entry, this can become a problem.
Say the IMG author added a “readme.txt” file, the ApplePi-Baker could by mistake take that file, resulting in a failed restore.

If you have an archive in this format, holding more than one file entry, then you may want to enable the “Full Archive Seek” mode.
Apple-Pi-baker will then find all file entries and if more than one file was found, a list will be presented to select from.

Log Window

If you’re keen on checking what is going on when ApplePi-Baker is running, or we need more information when things aren’t going all that well, then the Log Window can become in handy.

You can toggle the visibility, by clicking the “Show Log-Window” button.
Right clicking the log, offers a few options:

  • Copy Log to Clipboard (so you can easily post or email the log)
  • Save Log to File
  • Clear the log
Log Window

Log Window

Advanced Disk Panel

The original intent of ApplePi-Baker was to keep things simple for the user.

However,… after all these years I have seen enough users doing exotic things with my applications (which is awesome by the way!), and have seen the need for more information when troubleshooting. All this made me add this Advanced Disk Panel, and the more information I found, the more I kept adding. Remember – this is a hobby for me and it’s just fun to find all this kind of information.

Advanced Disk Information

In the Advanced Disk Panel, we can see of all the disks (visible to you or not) attached to your Mac – including mounted ISO/DMG/IMG files.

The devices printed in orange are not supported for Backup/Restore with ApplePi-Baker, as those are system disks.
More precise; these are disks that cannot be ejected – I may refine that in the future.

Note : in the upper right corner, you’ll see a disk icon. When this icon is gray (you can click it), only supported disks will be shown.

Per disk, you’ll see how it is connected, what brand/model disk it is (if provided by the manufacturer), capacity, devicename (in /dev/) and what partitions it has.

Per partition you’ll see the device name (/dev/diskXsY), it’s label and what type of partition it is – size and file system included, if applicable.

Note : If a partition is printed in Italic, then this means that this partition is NOT mounted.


Tinkering with System Disks and System Partitions … at your own risk!

If you get the insane idea to Eject your system disk (I’ll admit it, I have actually tried it!), then the system will tell you that it cannot eject the disk and nothing bad (should) happen. The same goes for mounting or unmounting.
That at least has been my experience.

No matter what my experiences are:
Please try not to tinker around with the system disks (like mounting the EFI partition) unless you really know what you’re doing.

Advanced Disk Panel

Advanced Disk Panel

CoreStorage Chaos

With Apples more recent way of dealing with disks (CoreStorage), you’ll potentially see some “funny” things.

In the example below:

It suggests I have two big sisks (disk0 – 1 Tb, disk 1 – 744Gb)
However, My 1Tb SSD (disk0) actually holds a virtual image for disk1 and I really only have one SSD in this Mac (disk0).

Look at partition /dev/disk0s2 – an “Apple File System (AFPS) Physical Storage”.
Fusion disk users will see something similar, maybe even with an additional layer in between.

Now, if you look at /dev/disk1, then you’ll see “Synthesized Disk – Physical Store on partition /dev/disk0s2”.
So the fake (virtual) “/dev/disk1” actually lives on /dev/disk0s2.

These virtual disks come with a problem when analyzing these disks – the partitions on this disk are flexible in size and are sized as needed. These partitions do not have a fixed size (unlike normal-old-school-straight-forward-regular-plain partitions). Hence the phrase “(virtual)”, where as other partitions show an actual size.

Accessing Disk Functions

Right clicking (or CTRL + Left click) a disk or partition will reveal a popup menu with some practical functions you may appreciate.

Availability of functions does depend on what item you selected.

Extra Disk Functions

Extra Disk Functions

As you can see, quite a few options:

ApplePi-Baker Disk Functions
Function Purpose
Select this Disk (/dev/diskX) Add the selected disk to your disk selection for backup or restore
(double click does the same)
Eject Disk Ejects a disk (unmount all partitions and eject disk)
Mount Volume This will try to Mounts a Volume (partition)
Unmount Volume Tries to Unmount a Volume
Reveal in Finder If a volume is mounted, then this will open it in Finder
Prepare Disk for NOOBs use Erase a disk, and makes a single FAT partition for NOOBs use
Expand All Expand all disks in the list, so you can see all details
Collapse All Collapse all disks in the list, so you just see the disks and no details
Copy Structure to Clipboard as Text This Copies the entire tree of disks and information to your clipboard
Copy All Drive Details to Clipboard as Text Copy all internal details of all disks onto your clipboard
Close Advanced Disk Panel Close the Advanced Disk Panel view

Reporting Feedback and/or Issues

When running into issue, feel free to place a comment below …
Please keep in mind that this is a hobby for me, so do not confuse this with me being your 24/7 helpdesk.

Reporting issues …

ALWAYS mention what macOS and ApplePi-Baker version you’re using.

To make it easier, I’ve added a function in the “About” window.

Open “About” (click ApplePi-Baker - About), right click the version info in the upper left corner and select “Copy Version Information“.
Paste that with your issue/comment!


NEVER post huge lists!

To keep things readable, please please pretty please do not post huge lists or log dumps.
It makes things unreadable and hard to find for other users.

IF a log or list is needed, I’ll let you know,…
In case you really feel you really must post a list or a log, then please post them in the Raspberry Pi Forum or the MacOS X Software forum.

Donation options

Donations are very much appreciated, but not required. Donations will be used for web-hosting expenses, project hardware or a motivational boost (a drink or snack). Thank you very much for those have donated already! It's truly AwEsOmE to see that folks like our articles and small applications.


There are 14 comments. You can read them below.
You can post your own comments by using the form below, or reply to existing comments by using the "Reply" button.

  • May 14, 2019 - 4:53 PM - JohnSeed Comment Link

    Nice job! It’s like McDonalds – I’m loving it! 



    • May 15, 2019 - 3:51 AM - hans - Author: Comment Link

      Thanks John for taking the time to place a compliment – it’s very much appreciated! 



  • May 19, 2019 - 3:39 AM - Gaetan Comment Link

    Hi ! That’s a great new to know ApplePie Baker has been updated. Very good job, can’t know any other tool on macos as simple and efficient ! Work great for my monthy Raspberry Pi 1:1 backup :) Thanks a lot !



    • May 19, 2019 - 11:15 AM - hans - Author: Comment Link

      Thanks Gaetan!

      So glad to hear you like the update! 
      Thanks for taking the time to post a Thank-You – it’s a good motivator to keep going.

      And … I may have a really awesome surprise for the next release (v2.1 – already working on it). 



  • May 21, 2019 - 5:16 PM - hans - Author: Comment Link


    I released ApplePi-Baker 2 a few weeks back, and while working with Jeff, one of the beta testers, I started testing shrinking images … which initially failed horribly, but in the latest iteration seems successful.

    So … right now I’m looking for folks, willing to test this feature.

    The idea is to shrink a Linux partition on backup, and expand it on restore, so backups from larger SD cards may fit on smaller SD cards.

    Additionally, ApplePi-Baker will now avoid including unused disk space in the backup.

    Since I have very little examples to play with (Raspbian, RetroPie and LibreElec have been working great this way), I’m looking for folks with real life situations, to see how well this may or may not work.

    Reply here, or send me an email at webmaster at if you’re interested in testing.



    • May 22, 2019 - 7:02 AM - hans - Author: Comment Link

      I did find a bug that impacted the speed.
      If anyone is interested in testing the “fix” then please let me know. 



    • May 23, 2019 - 8:59 AM - hans - Author: Comment Link

      Open invite to test 2.1.0 beta (download here).

      Version 2.1.0 comes with some major changes;

      – significant speed impact (while testing, backup almost 3 times as fast as before),
      – optimized backup (parts of the disk that are not partitioned will be skipped),
      – option the shrink or expand Linux partitions on your Mac.

      Since I have a limited number of Macs to test with, I’d love to hear feedback from other Mac users.



  • May 23, 2019 - 8:31 AM - Jimm Comment Link

    Does 2.0 work with Mojave? I get this error after clicking open on the security pop-up

    Access Violation

    Press OK to ignore and risk data corruption 

    Press Abort to kill the program

    Installing ApplePi-Baker-v2.0.0

    I’m running macOS 10.14.5

    Also, wanted to say you have a great program.



    • May 23, 2019 - 8:56 AM - hans - Author: Comment Link

      Hi Jimm!

      Thanks for the compliment!

      Yes it should work on Mojave (tested with 10.14.4 and 10.14.5).
      Unfortunately the message is rather vague (and I really wish I could improve on that).
      Did you mean that this happens when you start APB, and it asks for permission to install the Helper Tool?

      If you’d like, you can try the 2.1.0 beta (download here), which has some changes.

      Some of the changes are;
      – Improved timing (between main application and Helper Tool),
      – significant impact on speed, 
      – optimized backup (parts of the disk that are not partitioned will be skipped),
      – option the shrink or expand Linux partitions on your Mac.

      Since there have been a lot of changes, I’m not sure if it addresses the error you run into, but I’d love to find out what may be causing this.



      • May 23, 2019 - 10:05 AM - JImm Comment Link

        2.1.0 is doing the same thing.

        After installing the app, I go to the application folder right click the app, click open

        macOS asks if I want to run the app downloaded from the internet (gatekeeper), click open

        that is when I get the error message, when ApplePi-Baker is trying to open. APB never has a chance to ask to run the helper.

        If you need any logs or anything else I can do please let me know.



      • May 24, 2019 - 3:41 AM - hans - Author: Comment Link

        I’ve just uploaded a new version 2.1.0 – this time with a little less strict timing for the Helper Tool.
        Please let me know if this resolves the issue 

        Background; at startup APB checks if the Helper Tool is responding and I only gave it 0.1 second to reply during initial start, which may or may not be too short for some systems.



      • May 24, 2019 - 4:25 AM - hans - Author: Comment Link

        Forgot to ask: what kind of Mac do you have? (model/cpu/memory/disk)



        • May 24, 2019 - 5:58 AM - Jimm Comment Link

          the new 2.1.0 is doing the same thing (I downloaded from the link provided from previous comment.)

          here are my system specs:

          MacBook Pro (Retina, 13-inch, Mid 2014)

          Processor 2.8 GHz Intel Core i5

          Memory 16GB 1600MHz DDR3

          Hard Drive 512GB

          Graphics Intel Iris 1536 MB



        • May 24, 2019 - 7:18 AM - hans - Author: Comment Link

          Thanks Jim,

          I tried to reach out by email, but email is bouncing (maybe a typo in your email)?
          I have a beta version available for you – would you be willing to email me at webmaster at tweaking4all dot com?



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