return stolen macbook

A mechanism exists for the owner to track a Mac whose owner has flagged it as missing, by setting its status in their Apple-ID account online. To be found, it must be powered on, and would like to connect to a Wi-Fi network, such as by logging in with the "guest" account and connecting to Wi-Fi. It will then report it geographical location to the owner.

If your Mac is lost or stolen - Apple Support

The "tragic flaw" in this process is that the owner had to take action BEFORE the computer went missing, by linking the computer into "Find My Mac" on their Apple-ID account online.

Try giving a call to Apple Support and see if they can be of any assistance.

Get Support – Apple

https://getsupport.apple.com/

Call Customer Support (800) MY–APPLE (800–692–7753)

or online https://getsupport.apple.com/

or call AppleCare Support at 1-800-APLCARE (800-275-2273)

Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

https://support.apple.com/en-us/HT201232

Apple does not maintain a stolen computer registry, and

does not contact computer-owners and

the company does not get involved with Allegations of stolen computers.

The 'company line' is, "allegations of Stolen Goods are a matter for local police".