October 13, 2026 · by Talha Bekci, maker of KeyFollow
Plugging in a second screen takes a second. Making the two screens feel like one desk takes a few settings most people never touch. Here they are, in the order I'd do them.
1. Check how many displays your Mac supports
The MacBook Air and MacBook Pro with the base M1 or M2 chip officially support one external display. Newer and Pro/Max chips support more. Look up your exact model on Apple's tech specs page under Display Support before buying a second monitor or a dock.
2. Arrange the displays like your desk
System Settings → Displays → Arrange…. Drag the screens into the same order and height as on your desk, so the pointer crosses where you expect. Drag the white menu-bar strip to the screen you want as the main display: new windows and the Dock start there.
3. Pick a resolution that matches the distance
In Displays, select the external monitor and choose a scaled resolution. More Space fits more, Larger Text is easier on the eyes from further away. For a 27" 4K monitor, the middle options usually look sharpest.
4. Decide how Spaces behave
System Settings → Desktop & Dock → Mission Control → Displays have separate Spaces. With it on (the default), each screen has its own desktops and its own menu bar, and full-screen apps only take over one screen. Most people with two monitors want this on. A change takes effect after you log out.
5. Know where the Dock goes
With the Dock at the bottom, it lives on one screen at a time. To move it, push the pointer to the very bottom of the other screen and keep pushing for a moment. ⌘ ⌥ D hides or shows the Dock entirely, which is great on a small laptop screen.
6. Closed-lid (clamshell) mode
Want to use only the external monitor? Connect power, an external keyboard and a mouse or trackpad, then close the lid. The Mac keeps running on the monitor.
7. The shortcuts that tie two screens together
- ⌃ ↑: Mission Control, every window on every screen
- ⌘ `: next window of the same app, often on the other screen
- fn ⌃ ← / →: snap a window to half a screen (macOS 15+, all tiling shortcuts)
- Shake the mouse to find a lost pointer
8. The part macOS doesn't do
Even with everything set up, keyboard focus stays with the last window you clicked. Turn to the other screen, start typing, and the text lands back on the first one. KeyFollow fixes that by moving focus to the screen you look at, using the Mac's camera on-device, with no clicking.
Let your keyboard follow your head
KeyFollow notices which screen you turn to — with your Mac's camera, on-device — and moves keyboard focus there. No clicking, no shortcuts. Free for 7 days.