- Joined
- Feb 2, 2010
- Messages
- 108
- Motherboard
- Gigabyte GA-P55M-UD2
- CPU
- i7-860
- Graphics
- RX 570
- Mac
- Mobile Phone
Thank you!!Update OpenCore before updating macOS.
At the OpenCore Boot Picker, on the right of the icons of all your bootable drives, there should be an icon to Clear NVRAM. Clearing NVRAM three times should be more than enough.