Warning
Create a Time Machine backup before major updates, disk operations, or security changes on macOS.
What you will achieve
Locate or lock a missing Mac — setup before theft, not after.
1) Ensure Find My is enabled now
Open System Settings → [your name] → iCloud → Find My Mac and confirm it is on.
2) Mark Mac as lost
- Sign in to iCloud.com/find.
- Select the Mac and choose Mark as Lost with contact message.
3) Remote wipe if unrecoverable
Use Erase This Device only when recovery is unlikely and you have backup.