macOS X - Fusion Player on Big Sur "does not support nested virtualization" - MacOS X Software https://www.tweaking4all.com/forum/macos-x-software/macos-x-fusion-player-on-big-sur-does-not-support-nested-virtualization/ Tweaking4All.com Discussion Board en-US Sat, 09 May 2026 19:35:24 +0000 wpForo 60 RE: macOS X - Fusion Player on Big Sur "does not support nested virtualization" https://www.tweaking4all.com/forum/macos-x-software/macos-x-fusion-player-on-big-sur-does-not-support-nested-virtualization/#post-2789 Thu, 19 Nov 2020 15:57:12 +0000 p.s. if you get a "Side Channel Mitigations" error:

  1. Open "Settings" of the virtual machine
  2. Go to "Advanced"
  3. CHECK "Disable Side Channel Mitigations"
]]> MacOS X Software Hans https://www.tweaking4all.com/forum/macos-x-software/macos-x-fusion-player-on-big-sur-does-not-support-nested-virtualization/#post-2789 macOS X - Fusion Player on Big Sur "does not support nested virtualization" https://www.tweaking4all.com/forum/macos-x-software/macos-x-fusion-player-on-big-sur-does-not-support-nested-virtualization/#post-2788 Thu, 19 Nov 2020 15:46:39 +0000 After moving to VMWare Fusion Player, and updating to macOS Big Sur (11.0.1), I kept getting this error in VMWare:

     VMware Fusion does not support nested virtualization on this host.

The fix, as confusing as it may be was "easy" (once you know where to look):

  1. Open the "Settings" of the virtual machine (⌘E)
  2. Go to "Processor & Memory"
  3. Open (unfold) "Advanced Options" (at the bottom of the settings window)
  4. UNCHECK "Enable hypervisor applications in this virtual machine"

Now start the virtual machine again.

 

]]> MacOS X Software Hans https://www.tweaking4all.com/forum/macos-x-software/macos-x-fusion-player-on-big-sur-does-not-support-nested-virtualization/#post-2788