I installed Ubuntu on a PC build. Its great. I wish to get linux on my iMac as well but I am having trouble.
Newer intel macs have a T2 security chip that prevents booting from an external drive. There are various internet articles that explain how you can get around this with recovery mode.
I have followed these instructions on my iMac with the T2 chip. I reboot (holding the option key) and I am given the choice of an EFI start up disk, which I select and hit enter. The screen darkens and the iMac acts as if it is booting but nothing ever happens. I eventually have to hold the iMac power button down to shut the computer off.
Here was my process:
I rebooted my iMac while holding cmd+R.
Recovery mode came up, I enter my password.
I select Utilities > Startup Security Utility on the menu bar.
I type in my password.
I activate the radio button next to ‘Allow booting from external or removable media’ and also ‘no security’.
I quit the Startup Security Utility.
I restart while holding option.
I am given the option of the EFI flash drive to boot from, so far so good.
I select it, hit enter, the screen darkens but Ubuntu never boots up.
2019 iMac 27”
OSX Monterey 12.2
Does anyone have more information on this?
Thanks for any help.