How to set up multiple monitors on a Mac, and actually work faster with them
Plugging in a second screen takes a minute. Getting it to feel natural takes a few settings most people never change.
A second monitor is one of the best upgrades for a Mac. It's also easy to end up with a setup where the pointer gets stuck at the edge, text is too small, and your typing keeps landing on the wrong screen. Here's how to set it up properly.
1. Check how many displays your Mac supports
This catches a lot of people. Some Apple silicon MacBooks support only one external display, while Macs with Pro and Max chips support several. Look up your model's Tech Specs on apple.com (choose Apple menu → About This Mac to see which model you have). If you need more screens than your Mac supports, a DisplayLink dock with its driver is the usual workaround.
2. Arrange your displays to match your desk
- Open System Settings → Displays and click Arrange….
- Drag each display so it matches where it sits on your desk: left, right, above.
- Line up the edges so the pointer crosses where you expect. If your laptop sits lower than your monitor, put it lower in the arrangement too.
Getting this right means the pointer moves in a straight line from one screen to the next instead of catching on a corner. Using a monitor in portrait? See how to use a vertical monitor with a Mac.
3. Choose your main display
In the same Arrange view, one display has a white bar across the top. That's the main display: it gets the Dock by default, new windows and the login window. Drag the white bar to the screen you look at most.
4. Fix text size and sharpness
Select a display in System Settings → Displays and choose a size between Larger Text and More Space. On a 4K monitor, a scaled setting usually looks better than the native resolution, which makes text tiny. If your monitor supports a higher refresh rate, set it here too.
5. Decide how Spaces work across screens
By default each display has its own Spaces, its own menu bar and its own full-screen apps. That suits most people. If you need one window stretched across two screens, you'll need to change it. Both choices are explained in “Displays have separate Spaces”, explained.
6. Move windows between screens quickly
- Drag the window by its title bar to the other display.
- Hover over the green button at the top-left of a window and choose Move to followed by the display's name.
- Window managers like Rectangle add keyboard shortcuts for moving a window to the next display. See Mac window management: the built-in tools and the best apps.
7. Never lose the pointer
With a lot of screen space, the pointer is easy to lose. Turn on System Settings → Accessibility → Display → Pointer → Shake mouse pointer to locate. A quick wiggle makes the pointer briefly grow so you can spot it.
8. Make keyboard focus follow you
This is the one nobody sets up, because macOS doesn't have a setting for it. Across all your displays there's exactly one window that gets your keystrokes: the last one you clicked. Turn to the other screen and start typing, and your words go back to the first screen. The usual fix is to reach for the mouse and click first, many times a day.
Glance Switch fixes this. It's a menu bar app that uses your Mac's camera to notice which screen you're facing and moves keyboard focus there. The last window you used on that screen comes forward, so you can just type.
- A quick calibration of about 20 seconds per screen teaches it where each display is from where you sit.
- It switches once you've settled. Glances at your phone or a quick look across don't move focus.
- Nothing leaves your Mac. Frames are processed in memory and thrown away.
The background is in why you keep typing into the wrong window on a multi-monitor Mac, and the keyboard shortcuts that do exist are in how to switch between windows on a Mac.
Common questions
How many external monitors can my Mac use?
It depends on the chip. Some Apple silicon MacBooks support only one external display, while Pro and Max chips support several. Check your model's Tech Specs page on apple.com, or use a DisplayLink dock to add more.
How do I change the main display on a Mac?
Open System Settings → Displays → Arrange, and drag the white menu bar at the top of one display onto the display you want as your main one.
How do I move a window to another monitor on a Mac?
Drag it by its title bar, or hover over the green button at the top-left of the window and choose Move to followed by the display's name.