System lock pin code

[frat_precize]

Have a MacBook pro that was given to me in exchange for some work but I can't get pass the system lock pin code and previous owner doesn't have....How can I bypass this

 

[USAFRet]

Have a MacBook pro that was given to me in exchange for some work but I can't get pass the system lock pin code and previous owner doesn't have....How can I bypass this

Ask the owner, or ask Apple.
Per Forum policy, we cannot assist with circumventing passwords.
http://www.tomshardware.com/forum/id-2317969/read-passwords-lock-codes-pin-numbers.html