macOS 26: A table with more than 4 items will not render, placeholder progressview won't animate.

[marceloexc]

I have an example project here: https://github.com/marceloexc/dswaveform-26-issues

I've only tested it with a Table, but it might affect List's too. If you comment out audioFiles so that it only has <= 4 items, it will work. More than 4 items and it just gets stuck and never renders.

The example project also shows that a placeholder: (here I use a .linear ProgressView) never animates either. It doesn't do the bounce, it just stays at some weird initial position.

Tested on the latest macOS 26 Beta 9

[dmrschmidt]

Hey thanks for reporting this. Unfortunately I don't have access to macOS 26 beta currently, so cannot test this. Can you please elaborate more - maybe with screenshots, stacktraces etc. What your issue is?

[Edit]
For reference, this is what I'm seeing when I set the deployment target to 15.
Scrolling also works and shows the ProgressBar briefly.

[marceloexc]

These are some screengrabs

This one is built with > 4 items in the table. Its easier to see how placeholder: doesn't animate when i use a .linear progressview. Item's won't load and I don't see anything unusual in the logs. I always get reporterIDs on a working macOS 15 build.

Screen.Recording.2025-09-07.at.7.50.38.PM.mov

This one was built with only 3 items in the table. The waveform does render, but the placeholder is still non-animating (you can play/pause frame by frame and see that they don't animate)

Screen.Recording.2025-09-07.at.7.51.26.PM-1.mov

Had to compress it because github got mad but on the first build, I get a brand new error. This doesn't show up on the second build in the video

<<<< FigExportCommmon >>>> signalled err=-12785 at <>:7667

Not sure if this is related to DSWaveformImage at all. I googled it and only one result shows up mentioning AVPlayer so I guess it does?

[marceloexc]

If theres any other ways to send you a stacktrace / debug build / whatever let me know.

I do have a very very very naive fix that claude made for me here, and while it does make all items in the table render (plus replacing some assertionFailure into debugPrint's), it doesn't fix placeholder:'s not animating. Its only a bandaid fix for now.

[dmrschmidt]

Thanks for this added info. Chances are I won't be getting to this before macOS 26 goes public, at which point I'll likely update soon, which should give me a way to investigate this more closely.