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Comment on Custom NSWindow styleMask behavior changed/broken resulting in unresizable or non-responsive windows in macOS Tahoe 26.3 RC
Even Apple’s own system windows are affected. For example, in System Settings, when there is another window underneath, the left sidebar becomes unclickable and does not respond to any mouse input.
Topic: UI Frameworks SubTopic: AppKit Tags:
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Feb ’26
Comment on Custom NSWindow styleMask behavior changed/broken resulting in unresizable or non-responsive windows in macOS Tahoe 26.3 RC
Even Apple’s own system windows are affected. For example, in System Settings, when there is another window underneath, the left sidebar becomes unclickable and does not respond to any mouse input.
Topic: UI Frameworks SubTopic: AppKit Tags:
Replies
Boosts
Views
Activity
Feb ’26
Comment on Custom NSWindow styleMask behavior changed/broken resulting in unresizable or non-responsive windows in macOS Tahoe 26.3 RC
Even Apple’s own system windows are affected. For example, in System Settings, when there is another window underneath, the left sidebar becomes unclickable and does not respond to any mouse input.
Topic: UI Frameworks SubTopic: AppKit Tags:
Replies
Boosts
Views
Activity
Feb ’26