Fixed in macOS 14.3 (23D56).

You can download the runtimes directly from the here and for 2022 and later Apple platforms you can use the xcrun simctl runtime add command: xcrun simctl runtime add iOS_16_Simulator_Runtime.dmg Simulator runtimes for earlier versions can be installed with the xcodes tool.

The speed issues seem to have been resolved. The xcrun simctl runtime add command only works with 2022 and later Apple platforms: xcrun simctl runtime add iOS_16_Simulator_Runtime.dmg Simulator runtimes for earlier versions can be installed with xcodes.

The problem seems to be introduced in tvOS 15, I can reproduce it on tvOS 15.4 but cannot download the tvOS 15.0 Simulator at the moment as the downloads keep failing. The following code is enough to trigger the issue: let path = Bundle.main.path(forResource: "Example", ofType: "png")! let _ = UIImage(contentsOfFile: path) Reported as FB11892233.

Looks like the issue is back with missing symbols for watchOS 7.6.1: Could not download and install Symbols for watchOS 7.6.1 (18U70). Failed to download package from ADC. Domain: DVTDownloadableErrors Code: -1 Failure Reason: There are no valid accounts registered with Xcode that have the ability to access this resource. Recovery Suggestion: Contact Apple Developer Program Support to resolve account access issues. User Info: { DVTDeviceErrorIsProxied = 1; } -- Failed with HTTP status 403: forbidden A temporary hack to use the watchOS 7.6 symbols: cp -R ~/Library/Developer/Xcode/watchOS\ DeviceSupport/Watch6,1\ 7.6\ \(18U63\) ~/Library/Developer/Xcode/watchOS\ DeviceSupport/Watch6,1\ 7.6.1\ \(18U70\)