Sent also via contact us for support…
I’m trying to install Catalina off an external partitioned USB drive with the installer on. Boot Runner sees the APFS drive, but when I select it it restarts the machine and then I’m just presented with the same Boot Runner screen again and it won’t boot into the installer.
Do I need APFS BootRom support by installing this package?
Please help! I need to get Catalina on my Mac Pro 5,1 (mid 2012, 2 x 3.4GHZ) asap for work and am using the dosdude1 Catalina patcher to do it…
…I just can’t boot into the installer.
I have just tried putting my old graphic card in the machine to hold ALT to show the drives but that does not work any longer as I guess an issue as I upgraded my system with a new motherboard too, and had to do a firmware update to install High Sierra natively if I fully recall.