Brilliant! aidmony's solution works! Just to clarify a little bit on how I did it -
1. I downloaded the official v1.26 patch and applied it to a PC version of Frozen Throne on a friend's PC.
2. I copied the entire Warcraft 3 folder from the PC to the Applications folder my mac running OS Lion.
3. I downloaded the file from Step 3 in aidmony's post and copied the files in it to the Warcraft 3 folder.
Works like a charm!!! No hassle, no dual boot, no need to install Snow Leopard etc.!!!
I couldn't get this working..
Installed Wc3/tft, updated to 1.26 using the updater, copied the entire Warcraft III folder from my PC to my Mac.. took that The Frozen Throne.app from that Chinese site and copied it inside the folder and when I launch it, it says "Sorry, could not launch Warcraft III"
ideas?