Mac users interested in Korg microx editor generally download:
This software allows you to edit the microX in a stand-alone operation, or it can run as a plug-in editor in an AU, VST or RTAS environment.
This is Version 1.05. This is a newer version than the one that was included on the CD-ROM that came with your microX.
X50 Editor is software for editing plugins and presets for the Korg X50.