Apple's macOS Tahoe introduced a display flickering bug affecting Studio Display users since September 2025. The issue persists through subsequent updates and may impact other external monitors.
Studio Display owners report intermittent flickering when connected to Macs running macOS Tahoe. The problem appears most frequently during transitions between apps with white backgrounds or when scrolling light-colored webpages.
MacRumors and 9to5Mac documented the bug worsening with macOS 26.1 and 26.2 updates. Some users report the flickering intensifies when switching from dark to light content, with displays sometimes flickering multiple times consecutively.
Apple has not officially acknowledged the software issue. Multiple sources indicate the problem likely stems from macOS Tahoe rather than Studio Display hardware, given similar display flickering bug reports with non-Apple monitors.
Long-time Apple observer Dan Moren experienced the flickering across multiple Macs including Mac mini and MacBook Air models. He suggested the issue might relate to automatic dimming features in a December Mastodon post.
Some users found temporary relief by disabling display features like TrueTone, Night Shift, and automatic brightness. A third-party utility called Stillcolor reportedly fixes the issue for some by overriding Apple's display controller behavior.
The utility addresses what forum users identify as temporal dithering problems. Apple's display controller applies dithering by default to simulate smoother gradients, which may cause the flickering effect.
AppleInsider recommends affected users submit bug reports directly to Apple. The company typically prioritizes fixes based on service request volume rather than social media complaints.
Studio Display owners experiencing the issue should monitor for future macOS updates. Apple will likely address the bug through a dedicated software patch once engineers identify the root cause, similar to how Google addressed display issues in its December Pixel update.
The flickering problem has affected some Studio Display users since macOS Tahoe's release in September 2025.
