Jeff Benjamin:

A drawback of using an HDR-ready third-party monitor on macOS 26 Tahoe was the inability to activate High Dynamic Range at the common 2560 x 1440 scaled resolution. Fortunately, the newest macOS release resolves this problem.

Alexander Cohen:

• Symptom: scrolling is choppy on the Studio Display XDR at 120Hz or Adaptive (47–120Hz). At 60Hz, and on the MacBook’s own screen, scrolling is smooth.
• What devices are affected: M5 Pro MacBook Pros have reproduced the problem; other repots suggest the Mac mini with M5 Pro chip is also affected. Apple lists M5 Pro MacBook Pro models as supporting the Studio Display XDR at 120Hz.
• Likely cause: measurements suggest the GPU stays at a low clock speed while scrolling and misses frame deadlines.
• Workaround: MacRumors Forums poster Tiguanito’s M5ScrollBoost, a small menu bar app that encourages the GPU to run faster while you scroll.

Previously:

• MacBook Pro 2026
• Studio Display and Studio Display XDR

Update (2026-10-14): Timuçin Kabak:

Another issue I encountered is that the True Tone also applies to some external displays and applies a tint. I created a tool for it.