With macOS 11 Big Sur, Catalyst learned a new presentation mode. Next to the classic mode where Catalyst apps are scaled to 77% and retain the iPad look, there is a new Optimize Interface for Mac mode that does not use scaling and replaces various UIKit controls with AppKit colleagues.[…]
Back to crash – things make a little more sense now. There is no great equivalent for
UIStepperin AppKit, so the people at Apple decided that it is better to throw an exception if this control is used. FB8727188
The problem: It is not documented which controls are not allowed, and even more problematic, some controls are allowed, but customizations are not allowed.
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