how to upgrade operating system from 10.5.8 to mountain lion
How do upgrade my I MAC from MAC OS X ro Mountain lion?
iMac, Mac OS X (10.5.8)
How do upgrade my I MAC from MAC OS X ro Mountain lion?
iMac, Mac OS X (10.5.8)
To upgrade from OS X 10.5.8, you must first buy Snow Leopard by calling the phone number in the Apple Online Store: 800-MY-APPLE (in the US)
Make sure your system meets Snow Leopard's requirements:
Mac OS X 10.6 "Snow Leopard" System Requirements
To install Snow Leopard for the first time, you must have a Mac with:
After you install Snow Leopard you can decide if you want to upgrade OS X to the latest version, Mountain Lion. Mountain Lion is available in the Mac App Store, which is available to you after upgrading to Snow Leopard.
Make sure your system meets the requirements for Mountain Lion:
Mac OS X 10.8 "Mountain Lion" System Requirements
To install Mountain Lion, you need one of these Macs:
Your Mac needs:
If your system does not support Mountain Lion's requirements, you may be able to upgrade to Lion. To do that you must call Apple again to order a download code. Redeem the download code in the App Store to download Lion. Lion costs 99¢ more than Snow Leopard.
Make sure your system meets the requirements for Lion:
Mac OS X 10.7 "Lion" System Requirements
To determine which Mac you have, what kind of CPU it uses, and how much memory is installed: > About this Mac
The specified 2 GB minimum is barely adequate for either Lion or ML. They will run in 2 GB but you may not like its performance. 4 GB is a more realistic minimum.
how to upgrade operating system from 10.5.8 to mountain lion