A factory reset, also known as a hard reset, is the restoration of a device to its original manufacturer settings. This action deletes all user data including files, photos, and contacts. It is recommended to back up your data before performing a factory reset.

There are several ways to reset an Apple desktop computer. The most common way is to hold down the Command and R keys while the computer is starting up. You will be prompted to reinstall macOS.

Another way to reset an Apple desktop computer is to open the System Preferences window, click the Security & Privacy …