by Hallas » 27 Jan 2011, 22:44
I recommend wowmatrix for Mac users because it provides an installer/updater tool that will make downloading and installing mods very easy.
http://www.wowmatrix.com/
Go to the website and click on the tutorial for info on how it works and how to use it.
As for the mods themselves, I recommend Xperl for unit frames, Atlas and Atlasloot for dungeon/raid maps and items, and Auctioneer for auction houses. I also use DeadlyBossMods and Omen for raids and battlegrounds.
You can download and install as many mods as you want but I recommend only enabling a handful at a time so you don't cause a strain on your system resources. There are a lot of mods out there that demand heavy memory usage that can cause lag to your gameplay so you may want to experiement a little before actually playing.
Good Luck!