Does GRADEpro work only on PC?
Based on the only available download package, the software works only on Windows operating systems, but nowadays there are emulators that allow you to run Windows apps on Mac without installing the operating system.
Download Wine Bottler: http://winebottler.kronenberg.org/
Note: Download the DMG, install it and then use the Windows package from the link below to launch it in on Mac through Wine Bottler.
Download GradePro: http://tech.cochrane.org/revman/other-resources/gradepro/download