world of warcraft game download full

If I download the trial of World of Warcraft for Mac I have to re-download the full set after purchase?

I've uploaded Windows 7, which is double boot on my Mac, but his problems with viruses and problems with patches, so I put it on the Mac partition (i thought at first I would have to buy a WOW Mac separately). Never bought the box version of WoW so I was wondering if I download the trial version if that would work or if I'd only to re-download non-trial version later.

The test includes normal WoW. When you reach level 60, you will need to upgrade your account to The Burning Crusade and when you hit lvl 70 will have to upgrade your account to WoTLK. You do not have to buy the actual physical games to play, just update your WoW account, and to to download the game files from the servers of WoW.

How to download world of Warcraft for free [FULL VERSION]