Summary
After using the built-in Mac OS 9 theme with System Tweaks, the sidebar corner-radius override appeared to remain after the tweaks were disabled. This caused inconsistent corner radii between applications and window elements.
The affected global preference was:
NSSplitViewItemGlassMinimumCornerRadius = 4
The value matches the bundled Mac OS 9 theme configuration.
Environment
Expected behaviour
All global preferences changed by System Tweaks should return to their previous state when the option or theme is disabled, RetroMac quits, or recovery runs on the next launch.
Workaround
Removing the override and then logging out and back in restored the normal macOS appearance:
defaults delete -g NSSplitViewItemGlassMinimumCornerRadius
Reproduction status
This was observed after normal use but has not yet been reproduced from a clean preference state, so the precise disable/quit sequence is unknown.
Summary
After using the built-in Mac OS 9 theme with System Tweaks, the sidebar corner-radius override appeared to remain after the tweaks were disabled. This caused inconsistent corner radii between applications and window elements.
The affected global preference was:
The value matches the bundled Mac OS 9 theme configuration.
Environment
Expected behaviour
All global preferences changed by System Tweaks should return to their previous state when the option or theme is disabled, RetroMac quits, or recovery runs on the next launch.
Workaround
Removing the override and then logging out and back in restored the normal macOS appearance:
Reproduction status
This was observed after normal use but has not yet been reproduced from a clean preference state, so the precise disable/quit sequence is unknown.