ronnie2374 wrote:
I want to update from snow leopard 10.6.8 but the app store won't let me purchase mountain lion.
If it won't then it has already determined your machine is too old for Mnt Lion, in fact it's likely too old for 10.7 Lion too.
Your best option is to stay on 10.6.8 and save your pennies for a new 10.8 hardware coming out next release cycle or when that 10.6.8 machine dies.
10.7 was Apple's "Vista" anyway, you don't want it nor 10.8 that won't run your presently installed PPC based software and drivers for hardware.
I'm not sure how old my macbook pro is, how do I find out?
Apple Menu > About this Mac > more information and scroll down until you get a model like MacBook Pro 3,1.
Next download the free MacTracker and search for your model.
Would there be any other reason why the app store is telling me my computer is not compatible with mountain lion?
You might not have enough RAM installed on the machine and thus don't meet the specifcations for 10.7 or 10.8 on that.
The same process abouve will tell you the RAM (aka memory) amount) or you can use Activity Monitor in your Utilities folder.
Word is 10.7 and 10.8 like 4GB of RAM, despite Apple saying it can do with 2GB.
You don't need Lion to upgrade to Mnt Lion, Snow Leopard to Mtn Lion upgrades can accur no problem.