[mike_hearn]

All lies. They mean the symbols exist and can be linked against, but

https://developer.apple.com/documentation/devicecheck/dcappa...

> If you read isSupported from an app running on a Mac device, the value is false. This includes Mac Catalyst apps, and iOS or iPadOS apps running on Apple silicon.

[woadwarrior01]

That really sucks! TIL. So app attestation is iOS 14.0+, iPadOS 14.0+, tvOS 15.0+ and watchOS 9 only.