Devilution2010

I recently installed the KW parts pack and reduction pack on my mac without issue. For the KW pack, there should be a "gamedata" folder within the ZIP file. The KSP directory should be located in the Applications folder on your MAC. Copy the "gamedata" folder, open the KSP directory and paste. Ensure to select "merge files" so you don't completely replace the stock gamedata folder. Once you do this, you'll have a KWRocketry folder within the KSP gamedata folder containing all the goodies you desire. From my understanding, most of these mods will not work by just dragging their part folders into the KSP directory parts folder.