Failed to unmount disk - MacOS X Software https://www.tweaking4all.com/forum/macos-x-software/failed-to-unmount-disk/ Tweaking4All.com Discussion Board en-US Tue, 09 Jun 2026 02:04:39 +0000 wpForo 60 RE: Failed to unmount disk https://www.tweaking4all.com/forum/macos-x-software/failed-to-unmount-disk/#post-5572 Tue, 20 Aug 2024 08:46:12 +0000 Awesome! You fixed it before I even got a chance to read your question 😋 

Nice! Thanks for posting how you fixed it as well! 👍 

]]> MacOS X Software Hans https://www.tweaking4all.com/forum/macos-x-software/failed-to-unmount-disk/#post-5572 RE: Failed to unmount disk https://www.tweaking4all.com/forum/macos-x-software/failed-to-unmount-disk/#post-5571 Mon, 19 Aug 2024 15:58:38 +0000 Hi,

reassigning full disk access solved the problem!

]]> MacOS X Software Anonymous https://www.tweaking4all.com/forum/macos-x-software/failed-to-unmount-disk/#post-5571 Failed to unmount disk https://www.tweaking4all.com/forum/macos-x-software/failed-to-unmount-disk/#post-5570 Mon, 19 Aug 2024 15:34:08 +0000 Hello, trying to restore a backup to a brand-new ssd returns the error message "Error . unmounting of one or more partitions failed"

Can you please advice what to do?

Thx

Andreas

607

 

]]> MacOS X Software Anonymous https://www.tweaking4all.com/forum/macos-x-software/failed-to-unmount-disk/#post-5570