@AudioGod Thanks for the USB heads up. Still doesn't work. I just get a blank screen if booting from my USB. Ive tried again from scratch and still the same. Any ideas?
do you have above 4g enabled in the bios?
Hi @Shaneee , thank you for taking the time to do this. My 4g setting is enabled, so do I remove npci=0x2000? Im running Catalina 15.7. Do I need to name the USB as EFI or is it OK just to have the EFI on the USB named anything?
Ah ok. On my picker there is no Mac OS option. It’s an installed system and all I want to do is update OC. Do I need Mac OS on the USB?You don’t boot efi. It’s effectively loading itself that way. You need to choose the macOS option whether it’s the installer or an installed system.