Thank you @gigasquid  and @vrakesh 
It is indeed an Apple issue and the trick on stackoverflow.com seems to have 
worked.

However, to ascertain, do you have this test fail ?

nosetests tests/python/unittest/test_operator.py:test_dot
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/anaconda3/lib/python3.6/site-packages/nose/case.py", line 197, in 
runTest
    self.test(*self.arg)
  File 
"/Users/dRoberts/workspace/incubator-mxnet/tests/python/unittest/common.py", 
line 172, in test_new
    orig_test(*args, **kwargs)
  File 
"/Users/dRoberts/workspace/incubator-mxnet/tests/python/unittest/test_operator.py",
 line 2641, in test_dot
    atol=1e-2 if data_type == 'float16' else 1e-3)
  File "/Users/dRoberts/workspace/incubator-mxnet/python/mxnet/test_utils.py", 
line 491, in assert_almost_equal
    raise AssertionError(msg)
AssertionError:
Items are not equal:
Error 89.639374 exceeds tolerance rtol=0.001000, atol=0.001000.  Location of 
maximum error:(0, 0), a=-0.089639, b=0.000000
 a: array([[-0.08963938]], dtype=float32)
 b: array([[0.]], dtype=float32)
-------------------- >> begin captured logging << --------------------
common: INFO: Setting module np/mx/python random seeds, use 
MXNET_MODULE_SEED=663137163 to reproduce.
common: INFO: Setting test np/mx/python random seeds, use 
MXNET_TEST_SEED=691337631 to reproduce.
--------------------- >> end captured logging << ---------------------

----------------------------------------------------------------------
Ran 1 test in 0.115s

FAILED (failures=1)

[ Full content available at: 
https://github.com/apache/incubator-mxnet/issues/12727 ]
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