I have a late 2006 MacBook (MacBook2,1). I downloaded Elementary OS (5.1, Hera) and plunked it on a USB stick. I tried in in "live mode" and all was good. I committed to installing eOS and it was nearly done but died with this error:
Unable to install GRUB in /dev/sda Executing 'grub-install /dev/sda' failed. This is a fatal error.
I clicked "OK" and got this: Installer crashed (stuff about auto-filing a bug report)
I clicked "CLOSE" I then got a dialog saying that the installer encountered an "... unrecoverable error" and a desktop session will start so that I may investigate the problem. I clicked "OK" and got a desktop.
When I reboot the machine, I am now presented a grub prompt.
I followed the magic spell given: I proceed with a "manual boot," i.e.
- I located (hd0,gpt2)/boot/grub
- set root=(hd0,gpt2)
- Got the UUID of the partition
- Ran linux /boot/vmlinuz...
- Ran initrd /boot/initrd...
- Ran boot
The system came up.
Moving on to fixing the EFI partition ...
I ran sudo add-apt-repository ppa:detly/mactel-utils
It failed; turns out I needed to first install "software-properties-common" first ... I did so.
Re-ran sudo add-apt-repository ppa:detly/mactel-utils and got this error:
Err:9 http://ppa.launchpad.net/detly/mactel-utils/ubuntu bionic Release 404 Not Found [IP: 18.104.22.168 80] E: The repository 'http://ppa.launchpad.net/detly/mactel-utils/bionic Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default.
I'm now dead in the water. Since I can't install mactel-boot et al. (as per the web page), this whole endeavor is a failure at this point. I'm at a loss as to what to do next.
I've searched SE for solutions but may are outdated, reference Windows/dual booting, or are straight-up contradictory, e.g. same thread: "The solution is to boot to USB and NOT UEFI" v. "You need to install from the UEFI partition on your eOS USB stick"
For the record, I am NOT interested in dual booting. I do NOT care about preserving the HD's previous content or structure. All I want is a fresh, clean eOS install.