Errors while installing Ubuntu 20.04 on a Mac Mini A1993

boot-repair mac-mini gpt 20.04 grub-efi

I've stumbled upon the same issues while installing Linux Mint - it seems grub can't write to NVRAM in the MacMini (no clue what that means, just repeating what I read), and thus it needs to do stuff a bit differently.

Then, you have two options:

  • install rEFInd from MacOS and it will probably find your half-baked install and let you boot from it. A good guide is https://wiki.t2linux.org/guides/refind/ (and there you can also find other things you might stumble upon)
  • reinstall the OS by using a patched ISO like this one (from one of the t2linux wiki maintainers): https://github.com/AdityaGarg8/mbp-ubuntu/releases/tag/v20.04-5.15.11

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