I would advise sticking with 4.0.7
Right now, nightly builds are in a state of change, and not always for the better. (You will see this if you monitor the Forum for several days.) Bugs - some merely annoying, but some significant or even serious - appear and disappear every few days. I think you are better off using the 4.0.7 stable release, at least until there is a designated 5.0.0 Release Candidate.
I downloaded Nightly Builds until about 11 months ago, when development activity started to expose bugs as well as make significant changes to the KiCAD programs themselves. Since then, I have been running a Nightly Build from last February.
I am not a Mac user, but my impression from monitoring traffic on this Forum is that quite a few bugs peculiar to OS X have appeared over the last few months.