[aden1ne]

My main issue with multiple displays on Mac is that the dock sometimes suddenly switches display. Sometimes this doesn't happen for weeks, other times it happens multiple times a day. When this happens, it tends to move the dock from the internal display to the external display, and the existing window on the external display suddenly gets smaller. The only resolution I've found when this occurs is unplugging and re-plugging the external display.

[da768]

The dock moves whenever your cursor spends too much time hitting the bottom of the screen

[anentropic]

OMG, next time it happens I will try if this is a way to get it to switch back (without unplugging and replugging /or rebooting or whatever I usually end up doing)

EDIT: it's not the Dock I meant but the Cmd+Tab app switching UI, don't know what it's called... but I guess maybe which display they appear on are somehow related

[conradfr]

I can't emphasis enough how I hate that you can't have one dock per screen, aggravated by the fact that multiple windows of the same app (i.e browser) can't be degrouped.

[aden1ne]

TIL

[Karupan]

Not sure if it’s a bug with your specific setup, but scrolling vertically in a straight line from the centre of the screen all the way to the bottom will make the dock switch to that monitor.

[aden1ne]

Holy cow, that's so unintuitive.

[ArmandGrillet]

You can resolve this by putting the cursor in the center of the display where you want the dock to appear then move the cursor to the bottom of the display at an average speed.

Works everytime for me but this is also the reason why the dock moves to the wrong display!