they have fixed the command line args so the following work
application : /Applications/TouchOSC.app/Contents/MacOS/TouchOSC
Args.
–general.ui.autoreopen false ( don’t load last loaded file)
--general.ui.editor false ( go straight to run)
--general.ui.fullscreen true ( Fullscreen mode)
/Users/admin/Myfilename.tosc (File to load)
If you dont want it fullscreen, open load file put it in run, size and position then save, it will remember last size and position.