You didnt look hard enough. Was like the 5th link on the first page.
Here Quote:
Getting your Mac ready
1. Open your Mac's System Preferences
2. Select the Universal Access option.
3. At the bottom of the Universal Access window you will see a check box labled Enable Access for Assistive Devices. Make sure that option is selected.
4. Close the system preferences window and restart your computer for the change to take effect.
Download the Ventrilo Client Software.
1. Click Here to go to the Ventrilo downloads page.
2. Select the appropriate software for your machine and download it.
3. Run the installer.
Setting up Ventrilo
1. Start up the Ventrilo program
1. Click on the black arrow next to the User Name drop down window
2. Click on the New button and enter your user information.
3. Click OK to save the information
2. Click on the black arrow next to the Server drop down window.
1. Enter the IP address that your guild has provided for you.
2. Enter the Port number your guild has provided for you.
3. Enter the Password your guild has provided for you.
4. Click OK to save the information.
3. Click on the black arrow next to the Bindings drop down window
1. Click on the New button in the Setup Bindings Window
2. Name your new Binding settings. I called it Push To Talk
3. Click on the Add button in the lower left hand corner of the Setup Bindings window.
4. Push the button you want to be your Push to Talk Button in game and write it down, you will need this info later.
5. Verify that the PTT Advanced option is selected in the function drop down list.
6. Click OK to save the options.
7. A new window pops up called Edit PTT Advanced. Select Current channel from the Transmit Style drop down window.
8. Click OK to save your settings.
4. Click on the Setup button on the right hand side of the main Ventrilo window.
1. Verify that outgoing voice communications and Use Push-To-Talk (PTT Mode) are both enabled.
2. Select your PTT Hotkey in the Hotkey window. It is the same that you set the binding for earlier.
3. Check the Sound Output and Sound Input windows to be certain your headset is selected.
4. Click OK to save your settings.
5. Push the connect button to connect to the Ventrilo server and see if you can talk to your guildies.