We also had unexpected crashes on launch on iOS 17 due to using NSDecimalRound. We have followed the suggestion from the known issues in the Xcode 16 RC Release notes by writing a designated class in Objective C and calling the NSDecimalRound function from objective C instead of from Swift. This prevents the crash. Below our code: // DecimalRoundFix.m #import "DecimalRoundFix.h" @implementation DecimalRoundFix +(void)round:(nonnull NSDecimal *)result number: (nonnull NSDecimal *)number scale: (NSInteger) scale roundingMode: (NSRoundingMode) roundingMode { NSDecimalRound(result, number, scale, roundingMode); } @end // DecimalRoundFix.h #import <Foundation/Foundation.h> @interface DecimalRoundFix : NSObject { } +(void)round:(nonnull NSDecimal *)result number: (nonnull NSDecimal *)number scale:(NSInteger) scale roundingMode: (NSRoundingMode) roundingMode; @end Then in your Swift code replace everywhere: NSDecimalRound(&result, &number, scale, roundingMode) with DecimalRoundFix.round(&result, number: &number, scale: scale, roundingMode:roundingMode).

Also having the same problem with WCSessionFileTransfer. The didFinish fileTransfer delegate method is never called anymore. I also successfully used the solution with sending a custom message from the Watch OS app to the iOS app once the file received. I also noticed that the WCSession keeps all oustandingFileTransfers. I clean them by checking the progress, and cancelling them manually and do some custom cleanup. for fileTransfer in session.outstandingFileTransfers { if (fileTransfer.progress.isFinished) { fileTransfer.cancel() didFinish(fileTransfer) // my method } } Hopefully Apple fixes this issue soon.

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In addition to the correct answer of Quinn above. To conditionalise the entitlements based on platform, navigate to the xcode build settings, search for 'entitlements', and add an entry for a platform specific entitlements file, as in the example below:

I got the "Missing package product" error when including a local Swift Package in two xcode projects simultaneously (Xcode 13.4.1). My solution was to close one of the projects and then the error went away. It seems it is not possible to use the same local package simultaneously in two open projects.