For those who tried to run Dia on their MacBook, iMac, etc.
You should have notice that Dia simply doesn’t work, that’s what I saw when I’ve tried to use it 😉
Please find below a quick fix to run it
Simply run Dia using the terminal as below
Inspired by http://navkirats.blogspot.ch/2014/10/dia-diagram-mac-osx-yosemite-fix-i-use.html