Have a look at this TN to check: TN3117: Resolving architecture build errors on Apple silicon | Apple Developer Documentation

In MacOS with AppKit, you get it directly in the storyboard, by activating the undo checkbox. Hope that helps.

…are not receiving what they paid for. When trying to reach out to Apple… For sure you have read your licence agreement: https://developer.apple.com/support/terms/apple-developer-program-license-agreement/ 2.10 Updates; No Support or Maintenance … Apple is not obligated to provide any maintenance, technical or other support for the Apple Software or Services. … So, even though that may be frustrating, they just meet their contractual obligation on that point.

Could you show a screenshot, in the case of this website ? Which MacOS version ?

That's not normal. You should contact support: https://developer.apple.com/contact/ Try to get a phone contact, much more efficient.

Welcome to the forum Warren85. It is hard to say with such limited information. You should read this to get tips on how to post on the forum: https://developer.apple.com/forums/thread/706527 This being said, please tell: Is it an iOS app (for iPhone / iPad) ? Is it SwiftUI ? Show the code of the app (ContentView if SwiftUI), we shall help you. Or at list the part where the initial content should show on simulator.

The error in case 1: implicitly unwrapping an Optional value. Second option works like a charm. And allows to add subviews in the box, easily.

Many thanks, I'll keep it. For the dark mode, it seems that Finder that Finder is doing in the same way:

Thanks for reply.   You definitely wouldn't want to change the highlight style in "viewFor". Maybe do that in viewDidLoad or something. What's the issue ?   There's more than one way to do this. One would be enough Anyway, I change my mind to stay consistent with system behaviour and will change the color of the text (to white) when selected, to make it more readable.

Thanks for the reply. I tried to replace if let result = unarchiver.decodeObject(of: [/* list */], forKey: someKey) as? someClass { by do { let result = try unarchiver.decodeTopLevelObject(of: [/* list */], forKey: someKey) as! someClass It compiles but does not decode: I get a failure on log : unarchiving failed And with this pattern, I do not know how to test the "double call" within the print Is it an error to use unarchiver.decodeObject ? What can be the side effects ? unarchiver.decodeObject(of: [/* list */], forKey: someKey)

Thanks for the reply. But the question is: why NSNumber for Bool ? Likely because Bool is cast to NSNumberfor coding/decoding: https://stackoverflow.com/questions/45610119/swift-casts-bool-to-nsnumber-using-as-operator

Seems to be solved now on Jan 24.

SOLVED. I did log a message before each call of decoder.decodeObject(of: key:) That let me find the issue, and replace: self.aVar = decoder.decodeObject(of: NSArray.self, forKey: someKey) as? someClass by self.aVar = decoder.decodeObject(of: [NSArray.self, NSSet.self, NSNumber.self], forKey: someKey) as? someClass   Effectively, someClass has properties that have NSSet properties as well as Int. That was my error, but I still think that Xcode should be able to guess this and provide clearer messages or propose autocompletion. Not yet the case in Xcode 16.4 nor 26.2. I'll file a bug report for enhancement.

Thanks Albert for replying.   Is it an array where you use NSKeyedUnarchiver validateAllowedClass:forKey:? I have a lot of classes with SecureCoding, and I cannot find from the warning in the log where it comes from. What is surprising is that I have commented out all the NSNumber.self in any list of decoder.decodeObject(of:, key:) like if let format = decoder.decodeObject(of: [NSArray.self/*, NSNumber.self*/], forKey: formatKey) as? [[Int]] { And still get the log. *** -[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSNumber' (0x204cdbeb8) [/System/Library/Frameworks/Foundation.framework]' for key 'NS.objects', even though it was not explicitly included in the client allowed classes set: '{( "'NSArray' (0x204cd5598) [/System/Library/Frameworks/CoreFoundation.framework]" )}'. This will be disallowed in the future. *** -[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSNumber' (0x204cdbeb8) [/System/Library/Frameworks/Foundation.framework]' for key 'NS.objects', even though it was not explicitly included in the client allowed classes set: '{( "'NSArray' (0x204cd5598) [/System/Library/Frameworks/CoreFoundation.framework]" )}'. This will be disallowed in the future. So the questions: does the alert ask to include NSNumber.self in some decoder.decodeObject(of:) ? How can I find where the message triggers ? I will try to locate by setting breakpoints at decoder.decodeObject(of:, key:) calls, but there maybe a simpler way ? PS: this new API for secure coding makes it really difficult. It would be great if Xcode could propose the list of Types to include in decoder.decodeObject(of:, key:).

I have tried also: if let format = decoder.decodeObject(of: Array<any AnyObject.Type>.self, forKey: someKey) { I get the compiler error: Cannot convert value of type 'Array<any AnyObject.Type>.Type' to expected argument type '[AnyClass]' (aka 'Array<any AnyObject.Type>')   I then tried if let format = decoder.decodeObject(of: [AnyClass].self, forKey: someKey) { and got Cannot convert value of type '[AnyClass].Type' (aka 'Array<any AnyObject.Type>.Type') to expected argument type '[AnyClass]' (aka 'Array<any AnyObject.Type>')    And a last try: if let formatI = decoder.decodeObject(of: [AnyClass], forKey: someKey) { and got Cannot convert value of type '[AnyClass].Type' (aka 'Array<any AnyObject.Type>.Type') to expected argument type '[AnyClass]' (aka 'Array<any AnyObject.Type>')   What should I pass as of: argument?