Originally Posted by Canadian_steel
I got this from Blizzards forum that Blizzard officially posted. Their engineers probably discovered this. FYI and thanks.
One reason posted online was that WoW caches some data as the game plays, which gets indexed. In that case, you just have to exclude the WoW folder from Spotlight using the privacy panel. It's not going to boost performance overall though in the sense that your framerate will be higher.
There's no harm in following the listed options here but some are much more important than others:http://wow-blue.com/mac-technical-su...rformance.html
What spec hardware are you running on? If you run a benchmark tool like xbench, you can see what your hard drive throughput is. If you have an old hard drive, especially on an older machine, your writes can be quite slow, which would cause stuttering during caching. A solid state drive or even a faster hard drive can help.
If you want a higher framerate, the best thing to do would be to follow the graphics optimization guides:http://us.battle.net/wow/en/forum/topic/969747052