PyPI OSX 'Symbol not found' for jaxlib 0.1.31

Hi,

I am installing the package (version 0.1.31) from Pypi (on OSX Yosemite) by doing:

pip install --upgrade jax jaxlib

After that, I try to import the package:

import jax.numpy as np

And get the following error message (seemingly, because of the extension ‘xla_extension.so’ that can’t be imported):

Traceback (most recent call last):

  File "<ipython-input-1-122f308a8eba>", line 1, in <module>
    import jax.numpy as np

  File "/Users/moudiki/anaconda3/lib/python3.7/site-packages/jax/__init__.py", line 19, in <module>
    from jax.api import *

  File "/Users/moudiki/anaconda3/lib/python3.7/site-packages/jax/api.py", line 45, in <module>
    from . import ad_util

  File "/Users/moudiki/anaconda3/lib/python3.7/site-packages/jax/ad_util.py", line 20, in <module>
    from .tree_util import register_pytree_node

  File "/Users/moudiki/anaconda3/lib/python3.7/site-packages/jax/tree_util.py", line 44, in <module>
    from .lib import pytree

  File "/Users/moudiki/anaconda3/lib/python3.7/site-packages/jax/lib/__init__.py", line 40, in <module>
    from jaxlib import xla_client

  File "/Users/moudiki/anaconda3/lib/python3.7/site-packages/jaxlib/xla_client.py", line 37, in <module>
    from . import xla_extension as _xla

ImportError: dlopen(/Users/moudiki/anaconda3/lib/python3.7/site-packages/jaxlib/xla_extension.so, 2): Symbol not found: __ZNSt3__118shared_timed_mutex11lock_sharedEv
  Referenced from: /Users/moudiki/anaconda3/lib/python3.7/site-packages/jaxlib/xla_extension.so
  Expected in: /usr/lib/libc++.1.dylib
 in /Users/moudiki/anaconda3/lib/python3.7/site-packages/jaxlib/xla_extension.so

Thanks

[hawkinsp]

I added a comment to the installation instructions in the README specifying that the minimum Mac OS version is 10.12.

[thierrymoudiki]

Oh… Ok, I see.

Upgrading the OS might be the best solution, indeed.

Thanks for your response!