An app created in Swift that have read/write function to file. More than 80% testers doesn't have the issue. However, some testers have issues with reading from file (null values) after writing to file. Only 1 instance of storage is used (storage.saveVector, storage.writeVector) Anyone can shed some light? Same code base but why some users are encountering this issue? I read about concurrency and use of actor instead of class for thread-safety purpose. (https://www.swiftbysundell.com/articles/swift-actors/) Should i init the storage every time before use instead of using the shared instance?

Tried to implement the code snippets based on : https://developer.apple.com/documentation/authenticationservices/public-private_key_authentication/supporting_security_key_authentication_using_physical_keys security key. The Sign In UI did popup but after which is either it timed-out or i cancelled the operation. The performRequest function doesn't seems to trigger my external security key. Not sure if FBSSystemApp / coreauthd are part of the logs i should be looking out to see where the issue(s) is/are?

Created an ios app and try to scan for nearby bluetooth devices but didn't manage to find my Macbook (M1 Pro, Sequoia). How can it be done? Trying to match the peripheral name but didn't get it. The purpose of this is to try to see if the App can act as a FIDO2 Token to have the close proximity feature.

Understand other technologies or app doing mirroring will have 2 screens active at the same time. But for Apple iPhone Mirroring is showing only 1 screen at a time and with other protection of same Apple ID, Bluetooth and Wifi for proximity checks. Hence, it is really considered a iPhone Mirroring? https://support.apple.com/en-sg/120421