|Official supported support statement:
We support REAL Studio 20011r4 and later (up to date of the publishing of each plugin). Older versions will often work with our plugins but we do not support it officially or test for it in any way. (Some plugins may require newer version of REALbasic)
We support MacOS X 10.5 and later, Windows XP, Windows 2003 Server, Windows Vista, Windows 7 and Linux systems per the specs published by REALsoftware. Plugins will often work for other systems outside of those specs, but we do not support it officially nor test for it in any way.