Hi list, This is my first here post so please be gentle :) Here is the content of a bug report (radar 23008804) I've sent to Apple one week ago, but got no response. So I'm hoping someone here can help.
===================================================================================== Since 10.11, Core Audio can't list the airplay devices *except if the System Preferences audio pane is open* Many well known apps are impacted by this : Vox.app, VLC etc... I've referenced several messages on internet related to this major problem: https://forums.developer.apple.com/thread/17664 <https://forums.developer.apple.com/thread/17664> http://forum.kodi.tv/showthread.php?tid=241068 <http://forum.kodi.tv/showthread.php?tid=241068> http://support.coppertino.com/discussions/problems/2720-no-airplay-options-on-os-x-1011 <http://support.coppertino.com/discussions/problems/2720-no-airplay-options-on-os-x-1011> http://support.coppertino.com/discussions/problems/2718-airplay-behaving-weird-on-el-capitan <http://support.coppertino.com/discussions/problems/2718-airplay-behaving-weird-on-el-capitan> I've made a simple project to demonstrate the bug, it is ready to build and can be downloaded here: http://www.carrafix.com/airplaybugproof/airplaybugproof.zip <http://www.carrafix.com/airplaybugproof/airplaybugproof.zip> Steps to Reproduce: 1. Ensure you have Airplay audio devices around such as an AppleTV or any other Airplay compatible device for audio. 2. Ensure the System Preferences is quit 3. *Build* the attached xcode project. the main idea is that it lists all devices Core Audio can find. 4. Now *run* the app, it won't list any Airplay devices. On my machine here is the output: "list of all Core Audio devices 3 devices found: 2015-10-07 14:26:35.275 airplaybugproof[12718:1575252] device ID:51: 2015-10-07 14:26:35.275 airplaybugproof[12718:1575252] kAudioDevicePropertyDeviceUID: AppleHDAEngineInput:1B,0,1,0:1 <mailto:AppleHDAEngineInput:1B,0,1,0:1> 2015-10-07 14:26:35.276 airplaybugproof[12718:1575252] kAudioDevicePropertyDeviceNameCFString: Built-in Microphone 2015-10-07 14:26:35.276 airplaybugproof[12718:1575252] device ID:57: 2015-10-07 14:26:35.276 airplaybugproof[12718:1575252] kAudioDevicePropertyDeviceUID: AppleHDAEngineOutput:1B,0,1,2:0 <mailto:AppleHDAEngineOutput:1B,0,1,2:0> 2015-10-07 14:26:35.276 airplaybugproof[12718:1575252] kAudioDevicePropertyDeviceNameCFString: Built-in Output 2015-10-07 14:26:35.276 airplaybugproof[12718:1575252] device ID:38: 2015-10-07 14:26:35.276 airplaybugproof[12718:1575252] kAudioDevicePropertyDeviceUID: AppleUSBAudioEngine:Apple Inc.:Display Audio:162B0D4D:2,1 <mailto:Audio:162B0D4D:2,1> 2015-10-07 14:26:35.277 airplaybugproof[12718:1575252] kAudioDevicePropertyDeviceNameCFString: Display Audio" 5. Open System Preferences and go to the Sound pane. Ensure you have Airplay devices around, they should be listed. 6. (Quit and) run the app again and you'll see that Airplay devices are now listed such as my output: list of all Core Audio devices 4 devices found: 2015-10-07 14:25:51.252 airplaybugproof[12712:1571715] device ID:46: 2015-10-07 14:25:51.252 airplaybugproof[12712:1571715] kAudioDevicePropertyDeviceUID: AirPlay 2015-10-07 14:25:51.253 airplaybugproof[12712:1571715] kAudioDevicePropertyDeviceNameCFString: AirPlay 2015-10-07 14:25:51.253 airplaybugproof[12712:1571715] device ID:51: 2015-10-07 14:25:51.253 airplaybugproof[12712:1571715] kAudioDevicePropertyDeviceUID: AppleHDAEngineInput:1B,0,1,0:1 <mailto:AppleHDAEngineInput:1B,0,1,0:1> 2015-10-07 14:25:51.254 airplaybugproof[12712:1571715] kAudioDevicePropertyDeviceNameCFString: Built-in Microphone 2015-10-07 14:25:51.254 airplaybugproof[12712:1571715] device ID:57: 2015-10-07 14:25:51.254 airplaybugproof[12712:1571715] kAudioDevicePropertyDeviceUID: AppleHDAEngineOutput:1B,0,1,2:0 <mailto:AppleHDAEngineOutput:1B,0,1,2:0> 2015-10-07 14:25:51.254 airplaybugproof[12712:1571715] kAudioDevicePropertyDeviceNameCFString: Built-in Output 2015-10-07 14:25:51.254 airplaybugproof[12712:1571715] device ID:38: 2015-10-07 14:25:51.254 airplaybugproof[12712:1571715] kAudioDevicePropertyDeviceUID: AppleUSBAudioEngine:Apple Inc.:Display Audio:162B0D4D:2,1 <mailto:Audio:162B0D4D:2,1> 2015-10-07 14:25:51.255 airplaybugproof[12712:1571715] kAudioDevicePropertyDeviceNameCFString: Display Audio Expected Results: Airplay devices should always be liste, whatever the state of System Prefereces Sound pane is, as it has always be since 10.8 (at least) ! Actual Results: No airplay device is listed until the System Preferences Sound pane is opened Notes: This problem is new in El Capitan. It worked perfectly since 10.8 at least. =================================================================================== If anyone can help on this problem, please do. I'm considering implementing my own Airplay stack to stream to an airplay device. But this is quite a big task and Core Audio fitted my needs perfectly until 10.11... Thanks!
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