Running macOS 11.0.1 (20B29) with Xcode 12.2 (12B45b), with a brand new Xcode project configured as follows File -> New Project -> iOS -> App Interface: SwiftUI Lifecycle: UIKit App Delegate Language: Swift Uncheck all checkboxes In xcodeproj target, select Mac checkbox Run app on Mac I get the following errors 2020-11-26 21:24:42.940494+0000 Test[85254:1719377] [UIFocus] Focus system disabled 2020-11-26 21:24:43.029918+0000 Test[85254:1719377] [UIFocus] Focus system enabled 2020-11-26 21:24:43.606709+0000 Test[85254:1719377] [UIFocus] Focus system disabled In my actual app, I get a lot more of these - certain interactions like opening a popover can trigger them. If the last message was Focus system enabled, stuff works fine. If the last is Focus system disabled, a load of elements like Toggle and Slider aren't clickable. I couldn't figure out how to get it to end on an enabled state. I also tested this on my DTK and get the same errors on the 11.1 Big Sur beta with 12.3 Xcode beta.

iOS 13 introduced a new way to scroll within a scrollview - you can now touch and hold on a scroll bar, then drag to scroll. I'm trying to add some logic to the panGestureRecognizer of a scrollview. I attached my own handler via [scrollView.panGestureRecognizer addTarget: action:]. Both cases fire through panGestureRecognizer - but I can't see a way to distinguish which scrolling mode was active. I attempted to monitor the velocity of the panGestureRecognizer and which way the scrollview is responding - with the idea that when using the scrollbar, these directions oppose each other. But this is flaky, and has false positives and negatives.