I have OS X 10.8.5 trying to upgrade. Have downloaded latest OS X Maverick but to install I am prompted for the Admin Password. I don't believe one was ever set up. I have tried my Apple Id Password but not accepted, Advice appreciated.

My system is Mac HD OX S 10.8.5. I want to upgrade 10.9.1 and have downloaded it. However, to install it I am prompted for the Admin Password. I don't believe one was ever set up. I have tried my Apple Id Password but not accepted, Advice appreciated?

If you have 10.8.5 you don't have a PowerPC Mac (PPC).  PPC is for pre-2006 Macs.   Go to Apple menu -> About This Mac to make sure you have an Intel Mac and that you didn't flip the 5 and 8 in your operating system indication.  If you actually have 10.5.8 but you have Intel it gets a lot more complicated to install 10.9.
10.5.8 is the maximum for PowerPC.
10.6 can be upgraded on Intel with this tip:
https://discussions.apple.com/docs/DOC-2455
And it also help you get up to 10.6.6 or 10.6.8 as needed.
https://discussions.apple.com/docs/DOC-6271
will help someone with 10.5.8 determine if they are ready to jump to 10.7 or later.
If you have 10.8.5, you must install 10.9.0 first (free from the Mac App Store) to get to 10.9.1.
Backup your data:
https://discussions.apple.com/docs/DOC-1992
and check http://www.roaringapps.com/ and your printer, scanner, and peripheral  drivers are compatible with third party vendors before upgrading to 10.9.

Similar Messages

Maybe you are looking for