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imac firmware password

So I forgot my iMac firmware password and can't get into anything. The drive is locked so I can't even erase it. When I tried holding down option I got a lock screen on a grey page after which someone told me that I can change the ram and do a PRAM reset to fix it. I went back and now it's not working.... I don't even get a lock screen just an option with the Recovery Drive and an arrow pointing upward underneath.....

Hi vnayyar,

 

See the following article for guidance.

 

If you lost or forgot your firmware password

https://support.apple.com/en-us/HT203409

 

All the best.

Thanks. My iMac (as I forgot to mention) is fairly old and so won't be in that period. Also im made to believe that there is a way... Just not sure how....

最后更新：2017-09-13 15:05:21

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