Ultrawide displays gain explicit support in macOS 27

Apple is adding explicit ultrawide display support in macOS 27, enabling higher-resolution display modes and preserving monitor layouts when displays are reconnected.
LG curved ultra-wide Thunderbolt Display
The feature appeared in Apple's macOS 27 preview materials released on June 8 during WWDC26. Macs can drive higher resolutions on supported ultrawide displays, with Apple citing 5K at 120Hz as one example.The update also remembers display arrangements between sessions, allowing monitors to r