When disabling the opacity slider of color panels, my app crashes with unsatisfiable layout constraints. Feel free reproduce with a minimal test project: A macOS app based on the Xcode 26.0 template with only one line added to the ViewController's viewDidLoad() function:
NSColorPanel.shared.showsAlpha = false
The issue doesn't occur if this property is set to "true" or not set at all.
I just filed a corresponding bug report (FB20269686), although I don't expect any feedback from Apple ... as numerous issues I reported were never updated or commented at all (after migrating from RADARs).
Thank you for your post and the bug report. We are reviewing it and will respond to you via the feedback assistant.
You can see the status of your feedback in Feedback Assistant. There, you can track if the report is still being investigated, has a potential identifiable fix, or has been resolved in another way. The status appears beside the label "Resolution." We're unable to share any updates on specific reports on the forums.
For more details on when you'll see updates to your report, please see What to expect after submission.
Albert Pascual Worldwide Developer Relations.
