As i have posted allready in an update you need to remove the 64bit files from world of warcraft before patching it to 4.3.3.
For Windows that means to remove the following files from your World of Warcraft folder:
- Wow-64.exe
- Battle.net-64.dll
- MovieProxy.exe
Under MacOSX just remove “World of Warcraft-64.app” or “World of Warcraft-64″ in your World of Warcraft folder.
Then start the patching process by launching the game and wait for it to finish.
Then download the new 64bit client from the US Tech Support Forum. This version – like last time works for US and EU – both for Windows and MacOSX.
Again, unzip the archives and copy the files to your game folder and make sure that in the Laucher “Game Options” 32bit is not selected:


