I do need to pass some arguments every time the RhinoMAC it is starting and I cant find how to do this.
In Rhino for Windows we have the following startup options fields:
I do need something similar on RhinoMAC.
Very useful. Didn’t know that this possibility even existed!
Yes, I did, but seems that I skipped the “General” category.
Thank you for the tip.
no worries, windows and mac are pretty different in this regard, still i think the mac options/preferences look a bit more cleaned up 
I do changed the start-up options but seems that they have no effect!
I restarted a few times RhinoMAC7 and still the same result. This options are not executed at startup.
