Mountain Lion Requirements:
iMac (Mid 2007 or newer)
Your Mac needs:
- OS X v10.6.8 or OS X Lion already installed
- 2 GB or more of memory
- 8 GB or more of available space
You need first to upgrade to Snow Leopard 10.6.8 before you can upgrade to Mountain Lion 10.8.4
To purchase the Snow Leopard DVD contact AppleCare
Here are the specs for ML. I think you'd be best served by upgrading to Snow Leopard 10.6.8.
But what are your specs in Apple menu? Please go to Menu > About this Mac > and tell us Version, Processor & Memory specs on your Mac.
Hey macjack, I just copied and pasted the info below...
Model Name: iMac
Model Identifier: iMac8,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.66 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 6 MB
Memory: 2 GB
Bus Speed: 1.07 GHz
Boot ROM Version: IM81.00C1.B00
SMC Version (system): 1.29f1
Serial Number (system): W8******ZE3
<Edited by Host>