Find My needs to be configured before a Mac is lost. A useful preparation check confirms that the intended Apple Account can see the correct computer from another device, without experimenting with destructive or disruptive controls.

Start while the Mac is in your possession and working normally. Check which Apple Account should be responsible for it. On a shared Mac, Apple notes that Find My Mac can be used by only one user at a time, so resolve responsibility rather than assuming every local account has an independent setup.

Check the Mac’s location settings

In System Settings, open Privacy & Security, Location Services and enable the relevant Find My access. Apple notes that Find My Mac may appear inside System Services, Details instead of the ordinary application list.

Open your Apple Account’s iCloud settings, choose See All and Find My Mac, then follow the setup prompts. Review the Find My network option, which can help locate the computer even when it is offline. Availability varies by country or region.

Keep account recovery information accessible through your normal secure arrangements. Do not store the only useful sign-in instructions solely on the Mac you are preparing to locate.

Confirm the right device is listed

On another trusted Apple device, open Find My and its Devices list, or use Apple’s documented iCloud Find Devices website. Select the Mac and compare its identity with the computer beside you. Apple describes the displayed location as approximate.

If several Macs have similar names, resolve that ambiguity while all devices are available. Record the device identity privately so a future incident does not begin with guessing which entry belongs to the missing computer.

A listed device and a plausible location are enough for this readiness check. There is no need to activate Lost Mode or Erase to prove that you can find the entry.

Keep ordinary backups separately. Find My helps with locating and protecting a device; it is not a copy of the files inside it or a guarantee that a missing computer will be recovered. Recheck the account relationship after ownership changes or service that affects setup.

References: Apple: Find My Mac setup, Apple: locating a missing Mac.