Rotate a Mac display and use an external monitor in portrait

Rotate the picture in System Settings

1. Open System Settings → Displays and select the external monitor you want to rotate.
2. Choose 90° from Rotation.
3. Check the picture and click Confirm in the dialog.
4. Turn the physical monitor as its manual permits. If the text ends up upside down, select 270° instead.

Check cable slack and stand clearance before moving the panel. A cable that reaches comfortably in landscape may pull tight when the monitor stands upright.

These steps follow Apple’s display rotation instructions. Available controls vary by display and macOS version.

Choose between 90° and 270°

Both produce a tall desktop. The right choice depends on the direction your stand can turn and which way the text appears when the panel is in place.

Rotating the entire desktop is different from rotating a single photo or PDF. If only one document needs turning, first check the viewing controls in its app.

If the Rotation menu is missing

Apple’s Displays settings reference limits Rotation to supported external displays. A stand that pivots does not, by itself, establish software rotation support.

An extra app cannot guarantee support for an incompatible screen. If macOS does not detect the monitor at all, start with the external display setup checklist.

Check arrangement and readability in portrait

A taller desktop changes the edge shared with a neighboring display. If the pointer crosses in the wrong place, open Arrange in Displays and reposition the rectangles to match your desk.

Open a browser or document and check upright text, comfortable reading size and window movement between screens. Adjust resolution or scaling separately if text is too small. The display settings guide covers arrangement and resolution.

Return to landscape

Select the same monitor and change Rotation to Standard. Return the physical panel to its normal position, then adjust its arrangement if necessary. If the wrong screen changes, check which monitor is selected.

The macOS instructions were checked against Apple documentation on November 3, 2026. Preparing this article did not include a new hands-on test of System Settings.

Switch portrait and landscape with DeskCommit

If you turn a monitor for code or long documents, then return to landscape for video or wide tables, DeskCommit 0.4.4 and later offers keyboard rotation for supported external displays.

1. Open DeskCommit with Control–Shift–D and select the external display.
2. Press R to cycle through 0°, 90°, 180° and 270°, or Shift–R to cycle backward. You can also choose an angle from the rotation menu.
3. Review the angle, dimensions and arrangement in the preview, then press Return to apply. Before applying, Escape discards the pending change.
4. Use Command–Z to undo the last change during the same app session.

Built-in, mirrored and unsupported displays cannot be rotated. Rotation has no 15-second automatic revert. Saved setups and Undo after restarting the app do not include rotation angles. Rotation Undo is also unavailable if the display’s runtime identity changes, for example after reconnection. Rotating clears pending resolution and refresh-rate changes; select those again afterward if needed.

DeskCommit Personal costs US$4.99 once for one person and up to two Macs. It requires macOS 13 or later, has no free trial, and calculates tax at checkout. Check the features and purchase terms before choosing it. The settings saved in a setup are separate from rotation.