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by Carolyn Samit,★HelpfulOct 3, 2015 7:55 AM in response to MBKfromkarachi
Carolyn Samit
Oct 3, 2015 7:55 AM
in response to MBKfromkarachi
Level 10 (122,043 points)
Apple MusicIf you forget your firmware password
If you can't remember the password you set using the Firmware Password Utility or Find My Mac, schedule a service appointment with an Apple Retail Store or Apple Authorized Service Provider. Bring your proof of purchase (original receipt or invoice) with you. If you plan to visit an Apple Retail Store, make a reservation (available only in some countries).
From here > Use a firmware password on your Mac - Apple Support