For these reasons, Apple recommends that users keep Find my Mac enabled, but there are circumstances where you might want to turn it off. If you're selling your Mac or passing it on, for example, you should disable Find My Mac beforehand, because the new owner won't be able to disable it unless they have your Apple ID password. Similarly, if you're taking your Mac in to Apple for repairs, you may be asked to turn off Find My Mac. Whatever the reason, here's how it's done.
How to Turn Off Find my Mac
- Launch System Preferences from your Mac's Dock, from the Applications folder, or from the Apple menu bar ( -> System Preferences...).
- Click iCloud in the preferences panel.
- Scroll down to Find My Mac and untick the checkbox next to it.
- Enter your Apple ID password when prompted.
- Click Continue.
- Click the red dot at the top left corner of the window to close the preference pane.