Case Scenario Critical Reader - Authoring - Installing/Uninstalling - Installing MAC (OS X)
Once you download the tool you will see a new icon on your desktop - see image below.
Double click on this icon, you will see a popup window telling you to drag a CSCR icon into a folder labeled "Applications"
Once the file is done copying you can go to your Applications folder and launch CSCR.
Note: If you have Mountain Lion - OS X 10.8 and are having problems opening the tool
take a look at the document below to see how you could fix the problem.