Originally Posted by
willferg
I have an iMac from 2009 with OS 10.8.5, Mountain Lion. When I upgraded to that, I had to upgrade some programs. I'd love to know if I could upgrade further, but I don't want to rock the boat.
I don't see why you could not upgrade. I was running OS 10.7.5 lion and was afraid to upgrade. Finally bit the bullet and did it. So far no complaints. It did take some time to get it done, a few hours. A slight learning curve, no more iPhoto as there is a new photo place. Like it better. Like split screen and the fact that you can swipe to delete stuff instead of going to the trash can at the top in mail. Don't see much difference in speed, but that could be my service provider.