March 2016 Update
Warcraft 3 patch 1.27 added native support for Mac OS X El Capitan. From the patch notes:
Throw away that old PowerPC Mac in the closet, we’ve created a new installer to support Mac 10.10 and 10.11
The new Warcraft 3 update is at https://www.blizzard.com/en-us/download/?platform=macos
Warcraft 3 Mac OS X Install Guide
Here are the steps to install Warcraft III: The Frozen Throne on Mac OS X Yosemite. This guide assumes you have already installed Warcraft III: Reign of Chaos on your Mac using my youtube guide below:
Warcraft III: The Frozen Throne Installation
- Download the Windows version of Warcraft III: The Frozen Throne from https://www.blizzard.com/en-us/download/
- Download the Full Windows Patch for The Frozen Throne from https://us.battle.net/support/en/article/classic-game-patches
- In the finder, navigate to the location you installed the original version of Warcraft III (if you followed my youtube video, it will be installed in the Applications folder in your Home directory)
- Right-click on your Warcraft III icon and choose Show Package Contents
- Double-click on the Wineskin icon
- Click Install Software
- Click Choose Setup Executable
- Choose Downloader_Warcraft3_The_Frozen_Throne_enUS.exe that you downloaded in step 1 above (usually it will be in your Downloads folder)
- If prompted, download the setup files into your Desktop folder (this step could take a few minutes depending on your internet speed)
- Install Warcraft III: The Frozen Throne
- When the installation finishes, Quit the game
- Double-click on the Wineskin icon (the same you did in step 5)
- Click Install Software
- Click Choose Setup Executable
- Choose War3TFT_126a_English.exe that you downloaded in step 2 above (usually it will be in your Downloads folder)
- Install the Full Windows Patch
- When the patch finishes, Quit the game
- While still inside the package contents of your Warcraft III executable navigate to /drive_c/Program Files/Warcraft III/ and rename the Movies folder to something else (similar to what you did when installing the original game)