Quote:...Looking at that other thread, it looks like doing "save tool options now" should've maintained my preference to NOT have it all be one window… But it didn't work...
To fix the Window layout use Edit -> Preferences -> Interface -> Window Management Untick 'Save Window Positions on Exit' Click on Save Window Positions Now' Ok and exit Preferences.
A note about 'Save Tool Options Now' again you need to untick ...on Exit before clicking 'Save Tool Options Now' and for Gimp 2.10 you need to repeat the procedure for 'Input Devices' for a tool fix.
I assume MacOS is the same as other OS.