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chscag

 
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Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 38,401
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Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, OS X Mavericks

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I agree with harry. It has a firmware password set in. You can try the following method to remove it... it may or may not work:

Shut the machine down. Unplug it from the AC mains. Open up the memory compartment at the bottom of the unit and remove one of the modules.

Plug the machine back in and reboot. Try resetting the password. If it works, shut down again and replace the module you removed.

Note: This method works on some machines, mostly notebooks, but it has worked as well on iMacs. You'll have to try it. If the password can not be reset by this method, send the machine back and get a refund.

Regards.
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