When booting iMac (21.5 purchased late 2011).i get flashing folder with "?". Cannot reboot in safe mode, tried to reset PRAM, was then shown padlock screen equesting password. I didnt realise id set a password so dont rember it. this password differs from admin password for this imac.
iMac, iOS 6.1, bought late 2011 no recovery disk
iMac (Mid 2011) and later...Recovering a lost firmware password
Only Apple retail stores or Apple Authorized Service Providers can unlock these computers protected by a firmware password.
If you cannot remember the firmware password for your Mac, schedule a service appointment with either an Apple Retail Store or an Apple Authorized Service Provider. If you plan to visit an Apple Retail store, please make a reservation at the Genius Bar using http://www.apple.com/retail/geniusbar/ (available in some countries only).
flashing folder with ?, if i reset, requests password i do not have?
