^C2019-09-03T12:30:04.501-0400 F -        [main] terminate() called. An exception is active; attempting to gather more information
2019-09-03T12:30:04.510-0400 F -        [main] DBException::toString(): Location51042: Mixing ssl modes with a single replica set is disallowed
Actual exception type: mongo::error_details::throwExceptionForStatus(mongo::Status const&)::NonspecificAssertionException
 0x10411b879 0x10411ac17 0x7fff78eaa19e 0x7fff78eaa213 0x1034696e2 0x7fff7be08b5d 0x2800 0x7fff78e4fa0a 0x103554a0b 0x103556bec 0x10346ef39 0x103471e40 0x7fff7bc1d3d5 0x2
----- BEGIN BACKTRACE -----
{"backtrace":[{"b":"103467000","o":"CB4879","s":"_ZN5mongo15printStackTraceERNSt3__113basic_ostreamIcNS0_11char_traitsIcEEEE"},{"b":"103467000","o":"CB3C17","s":"_ZN5mongo12_GLOBAL__N_111myTerminateEv"},{"b":"7FFF78E9B000","o":"F19E","s":"_ZSt11__terminatePFvvE"},{"b":"7FFF78E9B000","o":"F213","s":"_ZSt9terminatev"},{"b":"103467000","o":"26E2","s":"_Z10quitNicelyi"},{"b":"7FFF7BE04000","o":"4B5D","s":"_sigtramp"},{"b":"0","o":"2800"},{"b":"7FFF78E47000","o":"8A0A","s":"_ZNSt3__118condition_variable4waitERNS_11unique_lockINS_5mutexEEE"},
... too long to include in the description

mongo(_ZN5mongo5mozjs15MozJSProxyScope4execENS_10StringDataERKNSt3__112basic_stringIcNS3_11char_traitsIcEENS3_9allocatorIcEEEEbbbi+0xCC) [0x103556bec]
 mongo(_Z5_mainiPPcS0_+0x3639) [0x10346ef39]
 mongo(main+0x10) [0x103471e40]
 libdyld.dylib(start+0x1) [0x7fff7bc1d3d5]
 ??? [0x2]
-----  END BACKTRACE  -----
Abort trap: 6

mongo 'mongodb+srv://user@inatlas.mongodb.net/dbname?authSource=%24external&authMechanism=PLAIN'