Hi all,
I’m encountering an issue when trying to run Apple Foundation Models in a blank project targeting iOS 26.
Below are the details:
Xcode: Latest version with iOS 26 SDK
macOS: macOS 26 Tahoe (installed on main disk)
Mac: 16” MacBook Pro with M2 Pro chip
Apple Intelligence: Available and functional on this machine
Problem:
I created a new blank iOS project, set the deployment target to iOS 26, and ran the following minimal code using Foundation Models. However, I get no response at all in the output - not even an error. The app runs, but the model does not produce any output.
#Playground {
let session = LanguageModelSession()
let response = try await session.respond(to: "Tell me a story")
}
Then, I tried to catch an error with this code:
#Playground {
let session = LanguageModelSession()
do {
let response = try await session.respond(to: "Tell me a story")
print(response)
} catch {
print("Failed to get response:", error)
}
print("This line, never gets executed")
}
And got these results:
I’ve done further testing and discovered something important:
I tried running the Code Along sample project, and there the #Playground macro worked without issues. The only significant difference I noticed was the Canvas run destination:
In my original project, I was using iPhone 16 Pro (iOS 26) as the run target in Canvas. Apple Intelligence was enabled on the simulator, but no response was returned when executing the prompt.
In the sample project, the Canvas was running on My Mac.
I attempted to match that setup, but at first, my destination was My Mac (Designed for iPad), which still didn’t work. The macro finally executed properly once I switched to My Mac (AppKit).
So the question is ... it seems that for now, Foundation Models and the #Playground macro only run correctly when the canvas or destination is set to “My Mac (AppKit)”?
