What if I forget my iMac password?
What if I forget my iMac password. The iMac was given to me and I had the Apple store wipe it. I changed it and don't use it all the time...forgot it.
Resetting or changing an account password:
For Snow Leopard or ealier: http://support.apple.com/kb/HT1274
For Lion or later: http://support.apple.com/kb/HT6022