Is this working on OSX?
Currently I can't confirm that because I can't test it myself, but when there is somebody who would like to help me testing, send me a message.
My mod doesn't work!?
Please create a new issue on here.
how to save my mod in Untiy?
Save it as a .scene file from the top left in 'file'. This will save all the data from you mod.
How to update the tool?
Get the lastest build from the GitHub page and open the .unitypackage with Untiy in the same project.