The testsuite/single/tests/efuns/time_ns.c test is failing on Mac OS X architecture because time_ns() is sending a different timestamp then expected. This is possibly related to #973.
Test run 1
Linux/x86-64 : time_ns == 1685569101359677056
Mac OS X : time_ns == 1941018635789
Microsoft Windows : time_ns == 1685569665383939200
Test run 2
Linux/x86-64 : time_ns == 1685570399750939650
Mac OS X : time_ns == 471089545033
Microsoft Windows : time_ns == 1685571063578462000