So, I know i'm probably in the minority here but I love the Mac OS. When I saw STO was going to run on OS X I was thrilled. Currently i'm running STO on a MacBook Air (2014 version):
Model Name: MacBook Air
Model Identifier: MacBookAir6,2
Processor Name: Intel Core i5
Processor Speed: 1.4 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 4 GB
Chipset Model: Intel HD Graphics 5000
Type: GPU
Bus: Built-In
VRAM (Dynamic, Max): 1536 MB
The game for me runs fantastic with graphics set to the Medium setting. I've ran STF's, CE, ground and space combat. In my opinion game play is solid. I've got a 23" external monitor connected and it handles the game great.
Anyway, just my two cents on Mac for STO.