There is a Mac sticky on the Tech forums.
1. Create a username here
2. Download and install the latest version: 2.6.8 (14 Feb 2013) Download
Remember Username and Password are Case sensitive.
1. Enter username and password.
2. Select a server
3. Select your game under "Ping Reduction" or "Routing Reduction"
4. A connection window will connect you to our server.
5. Open your game and play.
If you have other proxy software or Proxycap / Proxifier please uninstall them
and restart your computer before installing Lowerping.