Add your Mac to Find My
You can add your Mac to Find My to help you locate and protect it if it’s ever lost or stolen.
Note: For a Mac with macOS 10.14 or earlier, see the Apple Support article Set up Find My iPhone on all of your devices.
If you’re part of a Family Sharing group, and you set up location sharing with a family member before your Mac was lost or stolen, that person can help you locate it using Find My. See Change Location Sharing preferences in Family Sharing.
In addition, Activation Lock is automatically turned on to prevent anyone else from activating and using your device, even if it’s completely erased. See Activation Lock and Find My on Mac.
If you already set up Find My on this Mac, you don’t need to complete this task.
On your Mac, choose Apple menu > System Preferences, then click Apple ID.
If you don’t see Apple ID, click Sign In, then sign in with your Apple ID or click Create Apple ID (if you don’t already have one).
Click iCloud in the sidebar.
Select Find My Mac, then click Allow.
When you add a Mac, the ability to locate, lock, or erase it is turned on automatically. Additionally, Offline Finding is turned on, so your Mac can be found even when it’s not connected to Wi-Fi. To turn off Offline Finding, see Turn on Find My options.