Bit stuck - can anyone call out what I am doing wrong?
Have been running on this build for well over a year with no issues. Currently on Big Sur 11.4.
- Completed a full bootable backup using the guide and CCC to a USB SSD. Tucked it away somewhere safe.
- Completed a second full clone on another USB SSD - aim to test an upgrade to Montery.
- Using the guide I mounted the EFI on this drive using Hackindrom and updated OC to 0.7.8 with all the Kexts.
- Initiated upgrade to Montery via App Store - after first part of install it says it will restart.
- Selected boot loader F12 - booted from external SSD - selected HD Macintosh drive to continue install but just stuck in constant boot loop. Then get a OCB Startup image Failed.
Any suggestions?
I just wanted to test Montery on a clone of my Big Sur to check the upgrade went well without breaking my working system.... is this even possible?
Thanks!