Mastodawn

John Siracusa Mar 31, 2023

I've been tracking this one down for a few days. Ever since I updated to macOS 13.3, window dragging sometimes looks like this.

It happens with any window in any app. It stops when I hide some(?) other windows. Not sure why and which windows, but I'm working on it…

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John Siracusa Apr 24, 2023

Here's a better screen recording of the laggy-window-dragging bug I described earlier (currently filed with Apple as FB12122106)

https://youtu.be/h0bKmcsMFvw

FB12122106 Demonstration

YouTube

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Steve Troughton-Smith Apr 24, 2023

@siracusa that jittering tells me some other process is trying to update the window position as you're dragging it

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John Siracusa Apr 24, 2023

@stroughtonsmith I’ve been assuming it’s the snap-to-window-edge feature that was added to macOS several years ago, but somehow going haywire since 13.3 was released.

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David Anson

@siracusa @stroughtonsmith Have you tried a fresh OS on a USB key or external drive? I don’t trust that it’s not a side effect of something you added to the system. (No offense!)