Sandbox: mdworker deny(1) mach-lookup com.apple.audio.audiohald

[ylluxiun]

I'm having a huge number of events in my system.log with the following output:

<DATE> hostname kernel[0]: Sandbox: mdworker(<PID>) deny(1) mach-lookup com.apple.audio.audiohald

It seems that these spawn when I begin to have audio halts or the sound goes out; starts to crackle and then goes out until I unplug and then plug in the USB device again for audio output.

 

Any idea what this may be and its role in this error?  I assume that I need to add a rule to /System/Library/Sandbox/Profiles/com.apple.audio.coreaudiod.sb, however that line is already in there:

(allow mach-lookup        
        (global-name "com.apple.CoreServices.coreservicesd")
        (global-name "com.apple.PowerManagement.control")
        (global-name "com.apple.audio.audiohald")
        (global-name "com.apple.distributed_notifications@1v3")
        (global-name "com.apple.system.DirectoryService.libinfo_v1")
        (global-name "com.apple.system.DirectoryService.membership_v1")
        (global-name "com.apple.system.logger")
        (global-name "com.apple.system.notification_center")
        (global-name "com.apple.windowserver.active")
        (global-name "com.apple.SystemConfiguration.configd")
        (global-name "com.apple.SecurityServer")
        (global-name "com.apple.ocspd")
)