macOS 26 Tahoe introduces inconsistent window corner radiuses depending on window elements. Windows with toolbars get a more exaggerated corner radius than those without, causing visual mismatches when windows overlap. The same inconsistency applies to other elements like sidebars. A related WebKit bug fix confirms the issue causes scroll bars to be cut off due to these varying corner radii. The author criticizes this as a departure from macOS's historically consistent UI design.
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March 4 2026539 Impressions