What should I do if my MacBook is lost or stolen?

"What should I do if my MacBook is lost or stolen?: My mac book got stolen from my car . Somebody broke into my car"

-------

Erasing Find My Enabled:

If you are certain you'll never get this back, you can erase it with Find My. IMPORTANT: If that were to be performed, you'd lose all info on it, if you come across it again. So, find out more here: Erase a Device in Find My on iPhone - Apple Support

Having Been Stollen, Modify your Credentials:

• Modify: your login credentials (Using Both a New eMail and a New Passwordfor each and all sites)
• Associate: a different method of payment to your account
• Enable: Two-Factor Authentication for Apple ID and for all other accounts that have such an applicable option

What to do: If your Mac is lost or stolen - Apple Support