I need to edit plist file of TextEdit (TextEdit/Contents/plist.info) for doing this, using Xcode. But TextEdit says that I've got no permission for edit
I've tried to get more permission for me, so I inscribed myself in GetInfo (Pasha is me).
But still the same problem as on the pictures above. I was searching for an answer and found this. As you can see, this answer suggests me to do what I've already done. So I hope you know the different solution for this problem.