These out-of-box experiences (OOBE) offer no obvious shutdown option, but each can still be powered off gracefully: Windows: Shift+F10 → shutdown /s /t 0 macOS: Cmd+Q → Shut Down Linux Mint (first boot after an OEM install): Ctrl+Alt+F2 → quickly press and release the power button once the text console appears to shut down safely. GRUB may appear on the next boot; one complete startup clears recordfail and re-hides the menu.