Mac OS - UE4 editor windows -Float Always on top- like PC

Hi I have used both versions of UE4 on both platforms and I am curious why the UE4 for windows’s editor windows always float on top of the main editor window. On Mac OS, if you were to float say a material editor window on top of the main editor window and click back on the main editor window it would disappear (you would have to use ctrl+tab to get it back. NOTE: Not command tab but ctrl+tab to cycle through the various windows in UE4 ONLY).

Any help to find the setting that does this by default