It’s easy to purchase RadarScope for Mac from the Mac App Store (using OS X Snow Leopard 10.6.8 or later. If you’re not sure which version of OS X you have, go to the menu and select About this Mac.)
Click on the App Store icon in the Mac dock to launch the Mac App Store.
On the Mac App Store, use the search feature to find RadarScope in the Mac App Store, then click on the blue button underneath the RadarScope icon to purchase RadarScope on the Mac App Store for $29.99 (You will need a valid iTunes account to purchase RadarScope. Users who have already purchased and installed RadarScope will see “installed” in the place of the price tag on the blue button.)
Once RadarScope has installed, click on the RadarScope icon in the Mac dock to launch RadarScope (OS X Lion/10.7 users may need to fire up LaunchPad or access the Applications folder to find RadarScope).