Power on Mac and select the password-forgotten admin account to sign in. update: you can change/remove the firmware password. Way 2: Reset Mac admin forgotten password with Apple ID 1. Remember that modern versions of Mac OS are installed through the Mac App Store, and thus their methods of resetting a forgotten password or lost password are different than what is described here. i immedietly knew what my password was thank you so so much. Remember this specific method of resetting a forgotten password on the Mac is only relevant to Mac OS X versions that were installed by DVD or CD, which tends to be older Mac OS X releases only. If you don’t have a CD or DVD handy you can still reset your forgot Mac password using a slightly more complex process involving the Terminal. Reboot as usual, and your Mac OS X password will be reset!.

Select the disk which the password needs to be reset on, select the Username, and then enter a new password.

Once booted, select your language preference then pull down the ‘Utilities’ menu to “Password Reset” or “Reset Password” (wording is different depending on which version of Mac OS X you’re booting with).

How can I do it No DVD included when I bought it.

Insert the Mac OS X install disk into your drive, reboot the machine, and hold down the “C” key to boot from the disk. How to reset Firmware Password iMac, Lion, 10.7.3 I forgot the Firmware Password, and want to reset it.Enter your password to sign out of your Apple ID, then let the erase process finish. This works with any version of Mac OS X where you have a Mac OS X Installer CD or DVD. Click Open Time Machine to create it, if you havent already done so.

How to reset password for imac