Trying to upgrade my OS to Yosemite from 10.6.8, but it doesn't want to work.
I have to upgrade my operating system to Yosemite from 10.6.8. I've already checked to see what app compatibility problems I'll have to deal with, so I know pretty much what to expect. But when I go in to the Mac App Store and hit Upgrade Now, it sends me to a page that says Mac App Store Preview / OS X Yosemite. Then when I hit the View in Mac App Store button, it won't do anything, so I hit the link at the top of the page that says How to Upgrade, and it sends me to an instruction page that consists of a checklist of things to check on and the general requirements for the upgrade. Then when I hit the Upgrade Now button, it sends me back to that first Mac App Store Preview page that I was at before, with no way to get it to upgrade from there. If someone could please give me some advice as to how to go about this upgrade, I'd be extremely appreciative.
Mac Pro, Mac OS X (10.6.8), 2.8 GHz Quad-Core Intel Xeon