I find it does run better on Windows. I love my Mac and usually play via the Mac client simply because I much prefer OS X in general, and I often multitask (safari, Netflix) while grinding/fishing etc., but when I use bootcamp I can run higher graphics settings, I get higher avg. fps, and the PC client loads super fast (3 mins avg.) compared to my Mac client (10 mins avg.). I also find the load screens in game are much faster with the Windows client.
Also, I recall reading in a Mac forum that the disparity is largely due to optimization, i.e., Nvidia/AMD can optimize their cards for PC how they choose and are always updating the drivers accordingly. Apple requires they be optimized to their hardware/OS specs and they control when/if the drivers are updated.
I'm running the game both in Windows 7 (Bootcamp) and on my Mac and to me both are the same. I run both on the highest settings with no issues. My mac is a little older late 2009 here are my specs:
Intel Core i7-2600 @3.4GHz
Ram - 16GB
Windows 7 Service Pack 1 64Bit
AMD Radeon 6970M 2 GB
I have been playing the game since Beta on my MAC with no issues but the mouse pointer issue drives me nuts so installed bootcamp and play mostly there. From a graphics and game play perspective for me its the same. MACs are very versatile platforms that offer a lot of flexibility, I prefer to play on OSX but the game is running smoother on my windows partition and I dont have the mouse disappearing on me every couple of minutes (dont want to change the focus of the OP there are other posts about the mouse pointer and High Sierra).
"So you run the game in high sierra on max and acceptable 60+ fps? Please let me know how. "
TBH I dont know, ive never measured FPS before I just have my settings set to high and everything turned on. Sometimes I get lag but for the most part the game performs well. One correction the Mac I play on is a Mid 2011 not 2009 (thats another one I have).
This is interesting I’ve never considered boot camp since the game seems to function pretty well. I’ve never thought the windows client might be better.