Operating system: macOS Mojave 10.14.5
Graphics card: AMD Radeon R9 M370X 2 GB / Intel Iris Pro 1536 MB
Broken: Version 2.80 (2.80 2019-07-29)
Worked: Version 2.79
Short description of error
It would seem that when I try to close a panel by hovering over the divide in the two windows, whatever key I press (cmd/alt/fn) doesn't seem to give me the option to collapse it by joining with the other panel. Just seems to be that a key hasn't been assigned to do it?
Exact steps for others to reproduce the error
Basically, it happens when you open a new Blender file and try and collapse any window panel.