Uninstalling OpenCore

To remove OpenCore:

1. Remove OpenCore either from the USB or internal drive

• You'll need to mount the drive's EFI partition, and delete the EFI/OC and System folders
  • Note: Do not delete the entire EFI folder, this will likely break any existing Windows and Linux installations.
  • See here for an example on how to mount (opens new window)
  • For 5K iMac users, you will also need to delete boot.efi on the root of the EFI partition.

2. Reset NVRAM (opens new window)

Note that if you are on Big Sur when you remove the EFI folder, your Mac will no longer boot and show the "prohibited" symbol. Be ready to install an older version of macOS before you uninstall OpenCore.