macOS: translucent sidebar turns green during three-finger Space switching
What version of the Codex App are you using (From “About Codex” dialog)?
26.727.40816 (build 6067)
What subscription do you have?
ChatGPT subscription (exact tier omitted)
What platform is your computer?
macOS 26.3.1 (25D2128), Apple Silicon (arm64)
What issue are you seeing?
With the Codex translucent sidebar enabled in dark mode, the sidebar normally appears neutral dark. During a three-finger left/right gesture to switch macOS Spaces, however, the sidebar changes to a strong glossy green/teal tint.
A three-finger up/down gesture (Mission Control/App Exposé) does not produce the same tint.
This appears to be specific to the macOS transparency/vibrancy compositing path. Turning on System Settings → Accessibility → Display → Reduce transparency removes the artifact. Turning Reduce transparency back off so that translucency is active makes the behavior visible again.
What steps can reproduce the bug?
- Open Codex on macOS and use dark mode.
- Enable the translucent/transparent sidebar in Codex Settings → Appearance.
- Ensure System Settings → Accessibility → Display → Reduce transparency is turned off.
- Use a three-finger left/right trackpad gesture to switch between macOS Spaces.
- Observe that the sidebar changes from neutral dark to a glossy green/teal tint during the transition.
- Compare with a three-finger up/down gesture; the sidebar remains neutral dark.
- Turn on macOS Reduce transparency and repeat the left/right gesture; the green/teal tint no longer appears.
What is the expected behavior?
The translucent sidebar should keep a visually consistent dark appearance during macOS Space transitions and should not acquire a strong green/teal tint based on the gesture or transition direction.
Additional information
No screenshots attached.
This may share the macOS vibrancy/compositing path discussed in #18545 and #34415, but those reports concern GPU/WindowServer performance rather than this specific color-shift artifact.