Apple has completely removed ProMotion from Safari starting in Safari 17/macOS Sonoma

[JonathanParker]

This is not a visual change in the Developer context menus either, the "WebKitExperimentalPreferPageRenderingUpdatesNear60FPSEnabled" has been completely removed from the Safari Plist.

Spoiler: Vsynctester.com

 

[bogdanw]

'Prefer Page Rendering Updates near 60fps' is no longer available in the Experimental Features menu
https://github.com/WebKit/WebKit/pull/14794
Bug 257873 - 'Prefer Page Rendering Updates near 60fps' is no longer available in the Experimental Features menu
https://bugs.webkit.org/show_bug.cgi?id=257873

 

[shenfrey]

Almost certainly a bug or temporary measure.