CrashReportClient also crashes upon game crash on MAC

It looks like your CrashReportClient crashes on launch because it could load the TBB.dylib from the app container. Are you building the CrashReporterClient yourself? Could you make sure the third party binary is synced on the machine you are using for building. The binary is located in Engine/Binaries/ThirdParty/Intel/TBB/Mac/libtbb.dylib.