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chscag

 
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Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 40,273
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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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Have you read through the following Apple KB article regarding setting a firmware password? Link

You MUST boot with your install DVD and use the Firmware Password Utility from Utilities. Once you reach the Firmware Password dialog box, you type in your password. Then, instead of resetting it, leave it blank. That will remove the firmware password.

By the way, you can't reset a firmware password by changing the RAM.

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