Close all apps and open Terminal (Finder > Utilities > Terminal).
Enter sudo nvram -c and press Enter/return. Enter the Administrator password and press Enter/return.
Enter sudo shutdown -r now and press Enter/return. The computer will now restart, that’s it!
OpenCore supports boot hotkey support via boot.efi - hold Option or ESC at startup to choose a boot device, Cmd+R to enter Recovery or Cmd+Opt+P+R to reset NVRAM.