`Reason: image not found` for macOS packages

Recently we’ve seen tests begin to fail on macOS for a few independent project in the Dask ecosystem, all of which are failing with Reason: image not found. For example, over in https://github.com/dask/dask/pull/8472 we’re getting (see this CI build):

py.test dask --runslow --cov=dask --cov-report=xml -n4 
ImportError while loading conftest '/Users/runner/work/dask/dask/conftest.py'.
conftest.py:43: in <module>
    import tiledb  # noqa: F401
../../../miniconda3/envs/test-environment/lib/python3.7/site-packages/tiledb/__init__.py:34: in <module>
    ctypes.CDLL(lib_name)
../../../miniconda3/envs/test-environment/lib/python3.7/ctypes/__init__.py:364: in __init__
    self._handle = _dlopen(self._name, mode)
E   OSError: dlopen(libtiledb.dylib, 6): Library not loaded: @rpath/libcrypto.1.1.dylib
E     Referenced from: /Users/runner/miniconda3/envs/test-environment/lib/libtiledb.dylib
E     Reason: image not found

in https://github.com/coiled/dask-bigquery/pull/31 (see this CI build):

 E            - dlopen(/Users/runner/miniconda3/envs/test-environment/lib/python3.7/site-packages/pyarrow/_parquet.cpython-37m-darwin.so, 2): Library not loaded: @rpath/libssl.1.1.dylib
E             Referenced from: /Users/runner/miniconda3/envs/test-environment/lib/libthrift.0.13.0.dylib
E             Reason: image not found

and a similar issue was reported in https://github.com/dask/distributed/issues/5601.

The errors are similar, but appear to be pointing towards separate libraries not being loaded. I get the sense this may be some sort of packing issue (we’re using conda-forge packages in these CI builds) and I’m wondering if this is a know issue, or is folks here have any thoughts on how we may proceed in debugging. Apologies for the very vague issue, happy to dig in more if additional details would be useful.

[jsignell]

Well it seems to have stopped. I did add nodefaults and that seemed to make things better, so I guess we can close and just reopen if it comes up again.

[jakirkham]

Sounds good. Thanks Julia! 😄