I play on a late 2015 imac. For all config files, I do right-click, "open with", "other", and then select textedit. That has worked well for me. I don't know if there is some other setting difference between our computers, maybe, that is preventing it from working for you? (I'm not that good with computers.)
Whoops, forgot to ask my own question: Is there a way to adjust the view when riding a stage 4+ dragon? It's not so bad at stage 3, but by stage 4, it's very difficult to see anything, especially when trying to aim the fire attack, even in third person POV.
Press F7 when on the dragon, changes the camera angle.
Thank you for the reply and for the suggestion. It didn't work for me? I usually press F5 to switch from 1st person to 3rd person when I'm on dragons (or any other mount), to help zoom out a little. But it's still fairly hard to see anything on the ground or anything you're aiming at once they reach stage 4+. Pressing F7 didn't have any effect. :/
I wish we could have the old config option again, where we could change the render distance in 3rd person view. I'm not sure why it was taken away, but the default settings of the old version (I think 1.3?) were really nice when riding dragons, and I like that we had the option to adjust it, if we wanted a different zoom.