“column”

SharedModelContainer.txt Folks who filed their feedback report may have gotten responses from the feedback system. For people who see the same issue but haven't yet filed any feedback report, I'd like to share our investigation here to hopefully help. To give you more context, SwiftData (with DefaultStore) uses Core Data as its underlying storage mechanism. At runtime, SwiftData converts the schema to an in-memory Core Data model (NSManagedObjectModel), and uses the model to load and persist the data store. Before system 26.1, when handling an attribute of an array type, SwiftData converts the array type to Binary Data. On system 26.1, it instead converts the type to Transformable. This change leads to a difference between the in-memory model and the model used in the persisted data store, triggering a migration error with the following message: Error Domain=NSCocoaErrorDomain Code=134140 Persistent store migration failed, missing mapping model.” To work around the issue, you might consider the following opti

Because Mac Catalyst doesn't provide a great way to control width constraints of Split View controller columns (unlike the more sophisticated NSSplitView) I was proportionally computing a fraction min width/max width in -viewWillLayoutSubviews. For example: say I want to express a max primary column width as fraction. Sidebar can only grow to 1/2 of the Split View controller width we have to use this property: maximumPrimaryColumnWidth But there is no maximumPrimaryColumnFractionWidth property. Hard values for max column width only makes sense IMO if your window isn't resizable (hard min may be fine though so long as the window min width is properly configured). So to express maximumPrimaryColumnWidth as a fraction you have to compute it: (bounds.size.width/2.0). I was doing this in -viewWillLayoutSubviews and it worked fine before Liquid Glass. But apparently doing this with the Liquid Glass design wreaks havoc. Window resizing performance is much better if I take it out of -viewWi

I have a two part answer for you: Entitlements Networking On the entitlements front, I recommend that you review the table in Developer Account Help > Reference > Supported capabilities (iOS). The Apple Developer column shows all the capabilities available to folks using free provisioning, aka a Personal Team. There’s no supported way to use capabilities that aren’t listed there. On the networking front, you wrote: [quote='803362021, ImmuneFOMO, /thread/803362, /profile/ImmuneFOMO'] Bonjour networking between Mac and iPhone for session coordination [/quote] You don’t need the multicast entitlement if you’re using Bonjour [1]. You only need that entitlement if you’re sending and receive multicasts yourself. If you’re having problems getting Bonjour to work, I recommend that you work through the steps in Getting Started with Bonjour. That doesn’t help you with Family Controls, alas )-: Oh, I should mentioned one other thing: Many educational institutions have their own developer team. If that’s t

Issue still in iOS 26.0.1 Reproduce with the sample app 'DiffableDataSourceSample' from https://developer.apple.com/documentation/uikit/updating-collection-views-using-diffable-data-sources. It runs with UISplitViewController columns populated when compiled for target iOS 18.2. It comes up empty when target is changed to iOS 26. Both builds run on iPad at iOS 26.0.1 My app was patterned on this sample app and is failing to show content in the same way. FB20611981 submitted