refreshPreferences HangTracerEnabled / HangTracerDuration messages in iOS 11 + Xcode 9

Question

When update to iOS 11, after run app in iPhone, I receive this message in Xcode console:

SibDiet[924:111682] refreshPreferences: HangTracerEnabled: 0
SibDiet         


        

Answer 1

At this point, there are no data to suggest that you need to respond to this spewing of internal debugger status. BTW, these messages also appear when developing on physical devices, not just simulators.

The prior answer of disabling the Xcode Environment Variable OS_ACTIVITY_MODE will stop all such internal system messages with the unfortunate side effect of turning off console logging from NSLog() calls in ObjC. I have not checked, but it may also disable Swift print() logging.

The Xcode team should really discriminate between disabling system logging and user logging!