Do this first
Find it and lock it
- On another Apple device, open the Find My app. Or on the web, sign in to icloud.com/find.
- Select the Devices tab or click All Devices.
- Select your Mac to view its approximate location on a map.
- If your Mac is nearby, tap or click Play or tap the More button, then tap Play Sound to help you or someone nearby find it.
- To help prevent unauthorized access, turn on Lost Mode in the Find My app, or select Lost Mac on iCloud.com.
- When a Mac with Apple silicon is marked as lost, it’s locked with your Apple Account password. When an Intel-based Mac without a T2 security chip is marked as lost, you can remotely lock it with a passcode instead.
- To lock or erase your Mac, the Mac must be powered on and connected to the internet. If the Mac doesn't have an internet connection, you may still be able to see its location in the Find My app.