What is the purpose of 'Find My Mac'?

The purpose of 'Find My Mac' is primarily to help locate a lost or stolen Mac and to provide options for remotely locking or erasing it. This feature enables users to track their Mac's location on a map, making it easier to recover the device if it is misplaced or stolen. Additionally, if the device is deemed unrecoverable, users can remotely erase their data to protect their personal information from unauthorized access.

The ability to remotely lock the device serves to prevent others from using it until the owner is able to retrieve it. This dual functionality of locating and securing the Mac is what sets 'Find My Mac' apart as an essential tool for safeguarding personal devices and data.

The other options do not accurately describe the main features and purposes of 'Find My Mac.' For instance, while backing up files, improving performance, and resetting passwords are important aspects of Mac maintenance and security, they are not functions provided by the 'Find My Mac' feature.