I have Photoshop CS5 and would like to upgrade, but I don't want monthly fees. I'd like to buy a piece of software that has all the capabilities of Photoshop CS5, but with whatever new features may have been added since CS5 was released. Which product do I buy? I'm running an iMac running Mavericks.
There is no such product.
As close as you can get is to buy a perpetual license for Photoshop CS6. That's now a couple of years out of date, feature-wise.
Photoshop CC 14.x is only available via a cloud subscription.