I've only been a Mac user for a couple of years and got into OS X with Mountain Lion. In fact, my first OS X machine was a Hackintosh (before I got my first Mac, a 2011 iMac). I remember how OS X seemed faster then Windows in tasks I do most (Photoshop, Sketchbook). I didn't really run any benchmarks or anything, it just subjectively felt faster and the system didn't have these big lags as Windows did. I assumed OS X was a better performer - and I loved everything else about it as well. And, besides, it wasn't really about performance anyway - I liked the system more and as long as it would run at least as fast as Windows, I would rather use OS X. I became a Mac enthusiast and since then bought three Macs. However, recently, I installed bootcamp for some PC programs and put Photoshop on it too and while most things were equally fast as in OS X, certain things felt smoother on Windows, especially moving large layers or groups of layers with the move tool, that for some reason stutters on Mac (before I tried it on Windows, I assumed that's just how Photoshop works). And it's not just Photoshop - even the little things seem faster in Windows (I could be wrong, though): while Evernote sure looks prettier on OS X, scrolling through notes with large photos also lags a bit more than the Windows version. Also, since Yosemite lags here and there on my retina iMac and MacBook Pro, I assumed that the graphical requirements of retina displays are just too steep for the current hardware, and I really don't mind the occasional stutter. Imagine my surprise when I found out Windows 8 runs like butter. Granted, the resolution was "only" 4K (maximum for Windows/Bootcamp at the moment) and arguably Windows has less animations, effects and transitions, but still - everything, from resizing windows to opening the fancy start menu was much smoother and didn't seem to strain the hardware at all. Now, I know a lot of people were very critical of Yosemite performance and I'm sure there's a lot of fine-tuning and fixing for Apple to do. But my question is, basically, not about the latest OS X but OS X in general. Assuming that Apple sorts out the bugs and smooths out the performance so that it's on par with Mavericks or Mountain Lion, is OS X as fast as Windows for tasks like Photoshop, Illustrator or Zbrush - or are we paying some sort of "beauty tax"? Please note that all these performance estimates are just that: estimates. Personal and subjective. It is quite possible that things run just as fast, maybe even faster, and I just pay more attention to detail on OS X. I would like to hear your thoughts on this, but please, no hyperboles I know some people would claim that Yosemite is a million times slower than Mavericks that was a million times slower than ML, that everything is broken and that Apple only cares about iPhones, etc. As I said, let's assume that Apple will iron out all the bugs and issues, and talk about OS X in general. Is it the best choice for Photoshop and similar apps/workflows?