I created a bug report for this one but that was quickly dismissed. Unfortunately it is not possible to re-open closed JIRA issues, so I'll try again here :)
It looks like Demetra on OS X uses an undocumented and unsupported API on OS X, /dev/fsevents and because of that it requires the Demetra user to be an Administrator. Because of that Demetra requires me to enter an administrator passord during startup. Completely silly if you ask me.
This code is used for getting notifications about files that were changed outside of IDEA.
I don't understand why an undocumented API that requires admin privileges is part of an end-user application like IDEA. Also the previous versions of IDEA have always done it the 100% Java way without any problems.
So my request is to get rid of this or at least give an option to people to disable that code. It is annoying and completely unnecessary.