

I’m not the expert on clamshell mode, but based on what I’ve read about it, I think you’re going there simply because you have an external display and mouse connected. I think Display Maid (or any other similar utility) is probably the best solution for you.
MAC DISPLAY MAID WINDOWS
But windows that were on the internal display before you closed the lid won’t move back, because macOS doesn’t remember the previous positions when displays get reconfigured.


When you open the lid, the primary display will remain the external display and all the windows will remain there. If you make your external display the primary display, then this shouldn’t happen. Since the internal display is (I assume) becoming your primary display, all content is moved from the external (previously-primary) display to it. When you open the lid, you’re going back to a dual-display scenario. So everything is moved to your external display - because the content would otherwise be inaccessible.Īnd that external display becomes your primary display, because it’s the only one at the time. I think what’s going on is that when you enter clamshell mode, you’re switching from a dual-display configuration (I assume you are not using display mirroring) to a single-display configuration. What’s weirder is as soon as I open the lid everything disappears from the external display and is moved to the main display! (I used Display Maid to restore the windows - very convenient app.)
