It worked better for me and you should be right since after disabling Wi-Fi+BT on my Mac I got the following Xcode error: Message from debugger: The LLDB RPC server has crashed. You may need to manually terminate your process. The crash log is located in ~/Library/Logs/DiagnosticReports and has a prefix 'lldb-rpc-server'. Please file a bug and attach the most recent crash log.