# Uninstalling OpenCore
To remove OpenCore is actually quite simply:
- Remove OpenCore either from the USB or internal drive
- You'll need to mount the drive's EFI partition, and delete the EFI/OC folder as well as the System folder
- Note do not delete the entire EFI folder, this will likely break any existing Windows and Linux installations
- See here for example how to mount (opens new window)
- Reset NVRAM
Know 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.