MacBook Air (Late 2010), MacBook Pro (Early 2011) and iMac (Mid 2011): Recovering a lost firmware password
Symptoms
Learn what to do if you no longer remember the firmware password that you've set or if you see a password dialog when you try to select a startup volume on your MacBook Air (Late 2010) , MacBook Pro (Early 2011), or iMac (Mid 2011) computer.
Products Affected
MacBook Air (Late 2010), MacBook Pro (17-inch, Early 2011), MacBook Pro (15-inch, Early 2011), MacBook Pro (13-inch, Early 2011), iMac (27-inch, Mid 2011), iMac (21.5-inch, Mid 2011)
Resolution
Only Apple retail stores or Apple Authorized Service Providers can unlock a MacBook Air (Late 2010), MacBook Pro (Early 2011), or iMac (Mid 2011) computer protected by a firmware password.
If you cannot remember the firmware password for your MacBook Air, schedule a service appointment with either an Apple Retail Store or an Apple Authorized Service Provider.