Default screen width and height not working in OSX build.

Hi. I'm putting a solution here because this problem had no fix on the internet that worked for me.

The problem: I ran a windowed OSX build with no resolution dialog but the default screen width and height were not making a difference.

Solution: I hadn't set the bundle identifier, i.e., it was the default identifier. Setting the bundle identifier worked for me.

I hope this helps someone.
Cheers.