How to set up an ultrawide monitor on a Mac
Plug it in, set the resolution, then sort out the windows. The last step is the one most guides skip.
Updated
Step by step
- Connect it with the right cable. Use USB-C/Thunderbolt or DisplayPort for full resolution and refresh rate. Many HDMI ports top out at a lower refresh rate at ultrawide resolutions.
- Choose the resolution. In System Settings › Displays, select the monitor and pick its native resolution, or a scaled option if text looks too small.
- Set the refresh rate. Under the same display, set Refresh rate to the highest the monitor and cable support.
- Arrange your displays. Click Arrange and drag the screens to match where they sit on your desk. Choose which one is the main display.
- Give windows a layout. Use thirds or a centre column so your main app sits straight in front of you instead of stretched across the screen.
Common ultrawide sizes
| Size | Shape | Native resolution | Feels like |
|---|---|---|---|
| 29–30" | 21:9 | 2560 × 1080 | A wide 24" monitor |
| 34" | 21:9 | 3440 × 1440 | Two 24" monitors without the bezel |
| 38–40" | 21:9 | 3840 × 1600 or 5120 × 2160 | A 34" with more height |
| 49" | 32:9 | 5120 × 1440 | Two 27" monitors side by side |
| 57" | 32:9 | 7680 × 2160 | Two 32" 4K monitors |
Arranging it with your MacBook
Most people put the ultrawide in the middle and the laptop below or to one side. In System Settings › Displays › Arrange, drag the MacBook screen so its edge lines up with where it really sits; then moving the pointer between them feels natural. Set the ultrawide as the main display if you want the menu bar and Dock there.
If you close the lid, the Mac uses only the ultrawide (with power, a keyboard and a mouse connected).
Make the width useful
The first thing most people notice on an ultrawide is that every window opens in the middle and halves are too wide to read comfortably. The fix is to think in thirds:
- Centre column for the thing you're working on, straight in front of you.
- Left and right thirds for reference: docs, chat, a terminal, a preview.
- Full width only for timelines, spreadsheets and design canvases that need it.
macOS's built-in tiling only does halves and quarters. Kumiko was made for this: hold ⌃⌥ and press ← or → for a third, ↑ for the centre column, and press again to go wider. ⌃⌥ 1 (Focus centre) arranges every window around your main one, and each display keeps its own layout, so the MacBook can stay on Halves. Read more about Kumiko for ultrawide monitors.
Webcam and calls
On a wide screen, a call window off to one side makes you look away from the camera. Put the call at the top middle, just under the webcam. Kumiko's Meeting mode does this automatically when your mic turns on, with your notes underneath, and puts everything back after.
Kumiko is €30 once for 2 Macs, and the first 25 launch licences are €9. It works on macOS 14 or later.
Questions
What resolution should I use for an ultrawide on a Mac?
The native resolution is sharpest: 3440 × 1440 for most 34-inch 21:9 monitors and 5120 × 1440 for 49-inch 32:9 monitors. If text is too small, choose a scaled option in System Settings › Displays; at these pixel densities macOS may not offer HiDPI modes, so scaled text can look softer.
Can a MacBook drive a 49-inch ultrawide?
Apple silicon MacBooks can drive 5120 × 1440 over USB-C or Thunderbolt. Base M1 and M2 MacBook Air and 13-inch Pro models support only one external display, which can be an ultrawide.
Why does my ultrawide look blurry on a Mac?
Usually because it is running at a scaled resolution or over a cable that limits the signal. Try the native resolution and a USB-C or DisplayPort cable.
How do I organise windows on an ultrawide monitor?
Split it into thirds rather than halves, with your main window in the centre. Kumiko does this with ⌃⌥ and the arrow keys, and its layouts place every window at once.