Developer Tests Apple's Fix for macOS Window-Resizing Bug in 26.3 Release Candidate
By
erickhill
Lightly toasted, lightly seasoned, mostly correct.
Summary
A developer investigates Apple's claim that a window-resizing bug in macOS 26.3 Release Candidate has been fixed. The developer created a test app to perform pixel-by-pixel scanning around window corners to detect where mouse clicks are registered for resizing, testing Apple's resolution of the issue.
Key quotes
· 4 pulledIn the release notes for macOS 26.3 RC, Apple stated that the window-resizing issue I demonstrated in my recent blog post had been resolved.
I was happy to read that, but also curious about what had actually changed.
So I wrote a little test app.
It performs a pixel-by-pixel scan in the area around the bottom-right corner of the window, hammering it with simulated mouse clicks to detect exactly where it responds to those clicks (red), where it's about
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