Debugging apps in the iOS simulator logs system logs TIC Read Status, BoringSSL, and CoreTelephony XPC logs

Number:rdar://45237042 Date Originated:10/02/2018
Status:Open Resolved:
Product:Xcode Product Version:Xcode 10
Classification:UI/Usability Reproducible:Always

When debugging apps in the iOS simulator that make use of URLSession and CoreTelephony, the logs (specifically in the Xcode log console) are flooded with system logs from these sub systems. I've attached a sample app that reproduces the issue. This app is also available here:

This is frustrating because it hides logs we want to see from our app on launch.

Steps to Reproduce:

1. Build and run the sample app

Expected Results:

There is no log output in the sample app because it does not make calls to NSLog or os_log.

Actual Results:

The attached log output is produced in the Xcode log console (also see included screenshot).

macOS 10.13.6
iOS 12
Xcode 10

Any iOS simulator

Thanks in advance for your help!


Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!