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I've not been able to install 25.04 onto both a mid 2011 iMac and a late 2013 imac:

When booting off a USB drive with the iso (25.04), it hangs after the grub screen (with just a black screen and steady cursor in the top left). I removed "quiet splash" from grub and it seems to hang after "EFI stub: Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path". I also added the nomodeset parameter to grub but that didn't help. Choosing safe graphics also doesn't work

I tried upgrading by using the command do-release-upgrade -p and the same happened (on rebooting it hung in the same place).

Out of interest, I also tried installing Kubuntu 25.04 (from a USB stick) and got the same.

I verified the checksum and checked the ISOs after downloading them so I'm fairly sure they are good.

Tried using 2 different USB drives.

These appear to be the same problem:

  1. Upgrade Ubuntu 25 -> iMac 2011 Failed, Installation Ubuntu 25 -> iMac 2011 Failed
  2. Installation on MacBook Pro 2013 Fails
  3. After upgrading to 25.04, I have two Linux-images in GRUB, but I can only boot into one of them
  4. Ubuntu 25.04 bricked my 2015 macbook pro

In the meantime I've gone back to 24.10.

Any ideas?

Guy
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1 Answers1

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There is a bug registered for this problem:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2105402 There is a fix for this bug committed which means that the fix is done, but not available until next release.

In the meantime, you can use Noble 24.04 or install 25.04 by upgrading:

  1. Install 24.04 or 24.10.
  2. Install kernel 6.14.0-24.24 by adding the following PPA. This PPA is for pre-release and test kernels so do so at your own risk. https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa?field.series_filter=plucky
  3. Upgrade to 25.04. Ubuntu uses the latest kernel installed on a computer so it will use the one you've installed and your Mac should boot fine.

If you have already upgraded to 25.04 and your Mac isn't booting, you can select an earlier kernel from the GRUB menu (or you could try supergrub if you can't get to your grub menu).

If you want the best security and reliability, I'd suggest using Noble 24.04.

Guy
  • 116