If you already own the game, and buy the Mac addition...
That's exactly what you do; it's a serial code, just like the booster packs.
My guides:Dark Melee/Dark Armor/Soul Mastery, Illusion Control/Kinetics/Primal Forces Mastery, Electric Armor
"Dark Armor is a complete waste as a tanking set."

Yep, it's the same as adding a timecard, or buying any in-game item pack.
@macskull, @Not Mac | XBL: macskull | Steam: macskull | Skype: macskull
"One day we all may see each other elsewhere. In Tyria, in Azeroth. We may pass each other and never know it. And that's sad. But if nothing else, we'll still have Rhode Island."
"One day we all may see each other elsewhere. In Tyria, in Azeroth. We may pass each other and never know it. And that's sad. But if nothing else, we'll still have Rhode Island."
but you play on a PC and simply want the items that come along with the Mac copy, how would that work? Can I simply add something to my existing account to allow me access to these other items?