Besides the great usability enhancements, the new community nodes repository, and the various other new features that came with the new version of KNIME there is one more thing that you - and especially all Mac users - should know about:
Since KNIME 2.3 there is a fully supported Mac version of KNIME available! It has all the features of the Windows and Linux versions including the Report Designer. There is now also a SDK version available for the Mac. You can find both in our download section.
The KNIME team.