Oh, this is strange.

I don't file bug reports because this is unpaid word for Apple. And Apple never cared about my bug reports. For me it is mind blowing that they didn't saw that bug themselves.

Thank you for your answer. I'm not trying to test my app. I'm trying to build a developer tool. Good to know that this is unsupported.

Thank you for taking the time to reply. I don't believe in bug reports at Apple. Never had a good experience with them and stopped filing radars years ago. So I will learn to live with it. Have a nice day

The array is generated my code I took from a demo project by Apple. You can find the code here: https://github.com/dasdom/SimClicker/blob/3b0554c877211f9fc1f9054c850ac17f6863b2c7/SimClicker/UIElementUtilities.m#L216 The borders are irrelevant for the problem. I don't get the children. The result is that the border is not shown.

It's 10 years later and I still see this problem. So why should we take the time to file a bug report?

Thank you!

No, I only have one app at the moment. Do you have a link to documentation how to next a macOS app within another app? (I'm an iOS dev.)