I need my code pin MacBook

Two-factor authentication for Apple ID - Apple Support

Get a verification code and sign in with two-factor authentication - Apple Support

Could you elaborate a little on what you’re trying to do here, a d what’s (not?) happening?

The code for what? Logging into the Mac? AirPlay? Bluetooth? Two-factor authentication? Something else?

Writing an effective Apple Support Communities question - https://discussions.apple.com/docs/DOC-5931