My iPhone 13 Pro Max is on the the latest iOS 16 Dev Preview and Running Plex Beta through TestFlight, running Plex version 8.5 (2931)
I’m unable to launch Plex and receive the following error message from iOS
Developer Mode Required
“Plex” requires Developer Mode to run.
Until Developer Mode has been enabled this app will not be available for use.
I figured out the solve here.
YOU, the device owner, have to enable “Developer Mode” on your device.
To do so, got to:
Settings > Security & Privacy > Developer Mode
https://developer.apple.com/documentation/xcode/enabling-developer-mode-on-a-device
It seems this was a bug in iOS 16 beta 1 which Apple fixed with beta 2 – at least that’s what 9to5mac.com writes on their homepage. According to that, it only effected TestFlight apps.
Update (June 22, 2022): Apple has fixed this bug with iOS 16 beta 2. Users can now run TestFlight apps without having to enable Developer Mode. You can read the original article below.
