I read Apple's What's New in macOS about BigSur, and they have mentioned about an increase in the window radius, but they have not mentioned anywhere about what the radius is.

Throughout macOS 11, windows adopt visual touches that recall iOS interfaces. For example, windows integrate the sidebar, toolbar, and content areas, use an increased corner radius, and display lightweight controls.

In the past, the windows on macOS had a radius of around 7px. In BigSur, it is very clear that the radius of the corners has increased, but what is the exact radius of the windows?

  • I think you'd just have to do the same as the answer in your link and take a hand-made measurement. Just create a box with a corner of X-radius until it matches the radius of the window in Big Sur. You'll have your answer. – Allan Aug 15 '20 at 20:14
  • @Allan I would do that, but I unfortunately do not run BigSur. I tried finding screenshots on the web but they get too pixelated when zooming into the corners of the windows – Siddharth Dushantha Aug 16 '20 at 5:13
  • The smaller radius of Catalina is way better. Hate this update. Catalina has way cleaner UI, I updated one macbook and try to avoid the update with the other as long as possible -.- Someone with an Apple account should make a feature request so the corner radius can be customized by the user. – Daniel W. 2 days ago

As far as I can tell from analyzing a screenshot from a MacBook Pro 15 Inch: 18px

  • 2
    Actually, 18px would be the diameter, or radius when measured in @2x resolution. From what I've experimented, the radius is 9. Hope this helps. – Charlie Monroe Dec 8 '20 at 11:50

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