I'm having trouble installing the Catalina Patcher on an iMac 8,1 (2.8Ghz, 4gb ram, 256gb SSD, optical bay swapped out for a 1tb HD in an optical enclosure). I follow the instructions per the tutorial video, following the install method to create a bootable USB drive, erase and format my SSD as APFS, etc... when I proceed to install, the first part of the installation completes and the machine reboots, but then it just automatically boots right into the boot-from-drive mode rather than continuing the installation. Any idea what I can do?