Press ⌃⌥⌘ (Control, Option and Command) with an arrow key, and the front window moves to the display on that side of your arrangement. Full-screen apps move too.
- The arrow key picks the display on that side, as you placed the displays in System Settings › Displays. Arrange your displays
- To use other keys, open Settings › Advanced › Shortcuts and click the shortcut next to Move window to the next display. You choose the modifier keys; the arrow keys stay. The switch in the same row turns the shortcut off.
- The shortcut is the same for every display.
Windows come back
When a display goes to sleep, restarts or reconnects, macOS moves its windows away. Second Display puts them back on that display when it returns. To turn this off, turn off Put windows back when a display reconnects in Settings › General.
It needs Accessibility
Moving windows needs the Accessibility permission on the Mac you work on. Without it, these settings say “Needs Accessibility”, and Show Permissions takes you to the Permissions tab. Allow Accessibility (optional)