Windows Version
Windows XP,Windows Vista,Windows 7,Windows 8 and Windows 10 Operating Systems are Supported
Current Version 1.9 -Released on November 2018 .See the Change Log
Mac-OSX Version
Mass Watermark Supports Mac OS X version 10.7(Lion),OSX Version 10.8(Mountain Lion),OSX Version 10.9(Mavericks),OSX Version 10.10(Yosemite) and OSX Version 10.11(El Capitan)
Current Version 1.0 -Released on December 2015