I'm writing an application for macOS using SwiftUI and I want to allow the user to set some values for the app to use when it does work, but not to change those values if the app is currently working.

I've found that the .disabled() modifier works fine for buttons (disabling the Start button when it's already going, and disabling the Stop button when it's already stopped) but that it doesn't work for TextField. The TextField doesn't get disabled and, furthermore, there are a bunch of messages spewed to the log like:

AttributeGraph: cycle detected through attribute <##>

This is targeting 10.15, so maybe it gets fixed in Big Sur. But, you know, FYI.

Tried it on macOS 11.1 and works fine.

Cool! Okay, so that's one more in the column for upgrading.