Hey all: I'm wondering if any of you have experience booting recent Macs from non-Apple OSes. Asking because I ran the Ubuntu installer on a USB flash drive, and if I stick the resulting drive, I can boot my 2013 MBP from it, no problem; option key, choose the drive, it starts right up.
However, on my 2019 16" MBP, the same USB stick just results in the computer sitting at a black screen until I eventually force a shutdown.
Things I've tried already:
- Starting in Recovery Mode and turning off all the startup disk security options
- Starting in Recovery Mode and disabling SIP
- Installing rEFInd on the USB drive's EFI partition and using `sudo bless` on it
Nothing has made a difference so far—my 2013 still boots from it like it's no problem, but my 2019 just won't have it.
Is there anything I might have missed?