The one thing to remember if you wipe the machine and install Mountain Lion is that you won't have the apps that come with a new iMac. ML doesn't install iMove, iPhoto, or iDVD. You can purchase all of them through the App Store, iPhoto is only $15 US. If you need iMovie or iDVD to process your video from a video camera those are able to be purchased too.
If you have the password for one user that is an admin you can delete the other users and set up a new user for yourself as admin. Then you can boot to that new user and delete the other admin.
Xplain's use of MacNews, AppleCentral and AppleExpo are not affiliated with Apple, Inc. MacTech is a registered trademark of Xplain Corporation. AppleCentral, MacNews, Xplain, "The journal of Apple technology", Apple Expo, Explain It, MacDev, MacDev-1, THINK Reference, NetProfessional, MacTech Central, MacTech Domains, MacForge, and the MacTutorMan are trademarks or service marks of Xplain Corp. Sprocket is a registered trademark of eSprocket Corp. Other trademarks and copyrights appearing in this printing or software remain the property of their respective holders.
All contents are Copyright 1984-2010 by Xplain Corporation. All rights reserved. Theme designed by Icreon.