When other windows (Blueprint editor, settings windows etc…) are opened, they open behind the main project window and are impossible to bring to the front.
Branch: UE 4.4.0-2237849 Binary
OS X 10.9.4
iMac 3.5 GHz quad core i7, 16 GB RAM
NVIDIA GeForce GTX 780M 4 GB VRAM
The window level/activation issue may be caused by this: https://answers.unrealengine.com/questions/30659/weird-window-behind-editor.html
Resetting the layout through the Window menu puts the level editor back into the main frame window, and then the activation issues stop.
I’m glad you were able to answer your own question swillits!
I think this might be a side effect of us changing 4.4 to not use NSWindow’s child-window support and anyone having similar problems after updating to 4.4 from 4.3 should try resetting the layout.
If this problem resurfaces for you swillits, please let us know.