Back up your files with Time Machine or another backup method
Sign out of iCloud
Sign out of Messages
Sign out of Music, TV, and Apple Books if needed
If using macOS Ventura or later, open System Settings
Go to General
Select Transfer or Reset
Click Erase All Content and Settings
Follow the on-screen prompts
Enter your administrator password if requested
Confirm the erase process
Wait for the MacBook Pro to restart and erase itself
If using an older macOS version, restart the MacBook Pro
Hold Command and R during startup
Release the keys when the Apple logo or recovery screen appears
Select Disk Utility
Choose the startup disk
Click Erase
Quit Disk Utility
Select Reinstall macOS
Follow the on-screen instructions
Set up the MacBook Pro as new or shut it down for the next user