As of macOS 26.4, WKWebView content disappears after 3 seconds when part of a legacy ScreenSaver view hierarchy.

The title says it all, and I've filed FB FB22353950 that includes an Xcode 26.4 Screen Saver test project, QT movie demonstrating the error, and a PDF with complete steps to build and test.

I'm asking here just to learn if this sounds familiar. The SS built on 26.4 fails in 26.4, works fine on 26.3.1. I'll supply the test files if there's interest. Thanks.

Answered by DTS Engineer in 882234022
I've filed FB FB22353950

Thanks. That’s the best path forward here.

Oh, except that you should file an ER for a better screen saver API, one based on app extension technology. Normally I’d include my standard spiel on that topic, but I believe that you’ve seen already.

Share and Enjoy

Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Accepted Answer
I've filed FB FB22353950

Thanks. That’s the best path forward here.

Oh, except that you should file an ER for a better screen saver API, one based on app extension technology. Normally I’d include my standard spiel on that topic, but I believe that you’ve seen already.

Share and Enjoy

Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

You remembered. As did I, so recently I read your article "Bug Reporting: How and Why?". I'll workup an ER; now that I think about it an extension would simplify things for all. I'll mention the icon/thumbnail.tiff issue too, I made some progress there. Thanks.

As of macOS 26.4, WKWebView content disappears after 3 seconds when part of a legacy ScreenSaver view hierarchy.
 
 
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