I'm very upset because I feel like it should be easier to find than this, but in the docs (and the Float16 header): /// A half-precision (16b), floating-point value type. /// /// `Float16` is available on Apple silicon, /// and unavailable on Intel when targeting macOS. sooo, basically, if you conditionally compile for arm, it should work: #if arch(arm64) @available(macOS 11.0, iOS 14.0, *) let value: Float16 = 0 #endif

It appears to be centered around the usage of a custom scheme in the HLS m3u8 file link to the encryption key: if I use http(s) to link the encryption key, it works fine. If I use something custom like fakey, it never even makes it to the delegate method for AVAssetResourceLoaderDelegate called resourceLoader(_ resourceLoader: AVAssetResourceLoader, shouldWaitForLoadingOfRequestedResource loadingRequest: AVAssetResourceLoadingRequest) where I'd swap out the scheme for a real one, because it crashes first. So far, I can only replicate this on the iOS 15 simulator. I've opened a feedback: FB9764319