Do I have to turn on find my Mac on my computer?
You are out of luck. If you didn't turn on Find My Mac in System Preferences &gt; iCloud your MacBook was never registered, and cannot broadcast its location, or respond to location pings. If you have all the important information about the computer (serial number &amp; whatnot) you should report the theft to your local police station, constabulary, gendarmerie, etc.