To host on Mac
Step 1: Go to system preferences and select network.
Step 2: Take note your IP address. It must be 192.168.1.1** Or 192.168.0.1**
Step 3: A) If your IP address is 192.168.1.1** then open your web browser and type in 192.168.1.1

If your IP address is 192.168.0.1** then open your web browser and type in 192.168.0.1
[Take Note: Use either A) or

depending on your IP address]
C) If you are requested for a password and username, leave your username blank and password is admin
[Take Note: If the password is wrong, most likely it was change so try asking your parents]
Step 4: Once you are In Look for a tab call port forwarding or gaming and applications. If you cant find then try looking for a section that has Port Forwarding in it.
Step 5: Now just type the NAME OR APPLICATION warcraft 3
Step 6: The Port forwarding is 6112 and end is 6119
Step 7: Then for the Protocol enable both
Step 8: Type in the IP address as seen at step 2
Step 9: Go to Security and select firewall and select Allow Incoming Connections
Step 10: Start up the Frozen Throne Or Regin of Chaos and go to your options and the gameplay and make sure the port number is 6112.
Step 11: Just ENJOY to be a new HOST.
AutoRefresher for Mac,
Step 1: Go to
http://www.mono-project.com/Main_Page and download the Mono framework for Mac
Step 2: Then Install the Application and at the same time make sure that you have x11 in your utilities folder.
Step 3: Then go to this website and download the auto refresher.
http://www.hiveworkshop.com/forums/resource.php?t=62965
Step 4: Unzip Warcraft3AutoRefresh.zip and open the folder you just unzipped. Now open Terminal.app (you can find it in /Applications/Utilities) and type “cp ” (do not forget the space after “cp”) and then drag Warcraft3AutoRefresh.exe to the Terminal window.
Step 5: Now, type ” .autoref.exe” and press return (don’t forget the space before “.autoref.exe”)
Step 6: You can now exit Terminal. Open X11 (you can find it in /Applications/Utilities). Go to application menu and choose “Customize Menu…”
Step 7: In the window that pops up, click add, then double-click on the new item’s “Menu Name” column and set it to something like “AutoRefresh” (it doesn’t actually matter what it is, it’s your choice). Next edit the “Command” for it and set it to “mono .autoref.exe”.
Usage
Now everything is set up, well done! Now, when you want to use autorefresh, just open X11, and choose “AutoRefresh” from the Applications menu. (Obviously, it will only work when you’re hosting a game on BNet)
Credits : Hallee04