I would like my sandboxed MacOS app to save a log file in a sub-folder of the user's Documents folder, but the app cannot create the sub-folder, create a file or write to an existing file even though I have given the app full disk access via System Preferences-> Privacy. How can I do this?

The UIbarButtonItems in an iOS/ Swift app navigation bar in a view controller do not respond to clicks after navigation bar origin changed in the viewWillTransition event.

I have an image processing app for iOS that I would like to able to launch from Photos with a selected photo via the Share icon, in the same way that Messages, Mail and Notes (and a number of other apps) can be launched. How can I do this?