Set up Find My on Mac
Before you can share your location with your friends and find your devices, you need to turn on Location Services and Find My Mac. You can do this when you open Find My for the first time or later in System Preferences.
Turn on Location Services
On your Mac, choose Apple menu
> System Preferences, then click Security & Privacy.Click Privacy, then click Location Services on the left.
Click the lock icon
to unlock it, then enter an administrator name and password.Select Enable Location Services, then select Find My in the list of apps.
Set up Find My Mac
On your Mac, choose Apple menu
> System Preferences, then click Apple ID.Open Apple ID preferences for me
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 (if asked) to allow Find My Mac to use the location of your Mac.
If a Details button is next to Find My Mac, make sure you turned on Location Services and Find My in Security & Privacy preferences.
Turn on Find My options
On your Mac, choose Apple menu
> System Preferences, click Apple ID, then click iCloud in the sidebar.Open Apple ID preferences for me
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 Options.
If you see a Details button, you need to set up Find My.
Turn any of the following on or off:
Find My Mac: Turning this option on allows you to locate your Mac if you misplace it, and protect the information on it.
Offline Finding: Turning this option on allows you to locate your device (using Bluetooth) even when it isn’t connected to Wi-Fi or cellular.
Note: When you turn off Offline Finding, your Mac can’t be found by you or anyone else.
For details about privacy and how you can control what information on your Mac is exposed, see Guard your privacy on Mac.