This is a list of somehow known issues, i.e. bugs where enough people seem to have them that it seems it is not an issue in your app but instead related to the current beta. This list is helpful to keep you from trying to hunt down a bug that's not yours.
My app crashes when I close a window
If you see this when closing a window:
That seems to be an issue in the current beta
My app crashes with "another instance of this process was already running"
This seems to be a bug or a feature in Catalina. With AppKit apps, multiple instances of the same app (with the same bundle identifier) can be running without an issue. If you duplicate
Calculator.app 5 times and start them all, you have 5 calculators running. This seems to not be the case with Catalyst apps. If a Catalyst apps crashes in a certain way, apparently the system thinks it is still running. Thus, you can't run it again. Currently the only solution I know of is to reboot Catalina. Congratulations. The full error is:
I get weird SwiftUIKit compiler errors
Could it be that your
Xcode-beta.app is either not in
/Applications or not named
Xcode-Beta v11.app. Then, Catalyst apps currently won't compile.
When I create a new Window, the
This seems to be rather flaky currently.