Hello Apple friends, is anyone also having this problem: Sonoma's OpenCore boot manager can't detect the OpenCore Sequoia USB external installer be it on an external SSD or old school hardisk? I can't upgrade to OpenCore macOS Sequoia in short coz' I can't boot to the installer coz' the boot manager can't see it and I've done this many times in the past year, the creation of the installer should be correct.
This is on a Late 2015 5K iMac modified and upgraded with 2 internal 1TB SSDs (1TB separate for Boot Camp Windows 11 for sunday gaming) and 24GB RAM. This iMac has Metal in it.
Weirdly enough I do see showing in the OpenCore Sonoma's Boot Manager the regular Sequiao installer which I'm not sure what drive and partition it's coming from. It doesn't work of course and must be a side-effect when I tried directly upgrading to Sequoia using the regular Software Update to hopefull by-pass the OpenCore Sequoia installer which didn't work.
It used to boot OpenCore macOS installers with no problems using the external USB drive when it was the macOS Big Sur OpenCore Boot Manager.
What could be the fix?
Thank you in advance.
God bless the Apple Masterace.
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