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Is it possible to deploy a "Universal app", only for iPad OS & Mac Catalyst platforms without iPhone support in the App Store?

Everything worked in beta 6 (would build fine). Xcode 12 GM doesn't seem to recognize iOS 14 APIs in Catalyst apps, getting a whole bunch of 'cannot find type / in scope' errors when compiling for Mac. Also under Deployment info there is no 'macOS 11', which I think was present in the betas. How could this have happened?

Previously you could set the width of the preferredSupplementaryColumnWidth to automaticSupplementaryFillDimension, but this API seems to have been removed. hideColumn: method seems to have no effect. Any one manage to show only Two Columns in Landscape on iPhone using UISplitViewController with a triple-column IB setup? Triple column layout is utilized on the iPad/Mac, but want two columns, max, on iPhone in landscape.

I've tried using renaming Identifier: 1) Automatic / Lightweight migration seems to fail, because "CloudKit integration forbids renaming entities. older devices cannot process these records" 2) Tried using just NSPersistentContainer, and the lightweight migration still fails with the above message. NSPersistentCloudKitContainer seems to have marked/tainted the persistent store / SQLite so that renaming of entities is not possible at all. Does anyone know if it is possible to rename entities once you start using NSPersistentCloudKitContainer? (heavyweight migration or such?) Has anyone done this before, in a production app or otherwise?

I used a renaming identifier to rename an Entity Name, but it doesn't seem to work and it causes a crash at start during in-place migration. How to rename an Entity Name when using NSPersistentCloudKitContainer? I get this exception at start: CloudKit integration forbids renaming 'OldEntityName' to 'NewEntityName'. Older devices can't process the new records. Unresolved error Error Domain=NSCocoaErrorDomain Code=134110 "An error occurred during persistent store migration." App is not in production, need a way to rename 'OldEntityName' to 'NewEntityName'. How to achieve this?

What would be the Objective-C equivalent of "#if targetEnvironment(macCatalyst)" (works in swift but not objc)? I'm getting "Function-like macro 'targetEnvironment' is not defined" error

Is the wal file supposed to fluctuate in size or just keep on growing in size? It seems to be ever-growing. data.sqlite - 266KB data.sqlite-shm - 33KB data.sqlite-wal - 3.3MB Are there any zombie objects or such causing the file size to keep on growing? How do I debug what's causing the write-ahead-log file to keep growing in size?