tests/testDRP.py will fail on modern Mac OS

print subprocess.Popen("bin.src/reduceArcRefSpec.py %s --id visit=%d --refSpec %s --lineList %s --loglevel 'info' --calib %s --output %s --clobber-config" % (self.testDataDir, self.arcVisit, self.refSpec, self.lineList, self.testCalibDir, self.testDataDir), shell=True)

self.testDataDir = < /Users/jds/Projects/Astronomy/PFS/src/drp_stella_data/tests/data/ >
self.testCalibDir = < /Users/jds/Projects/Astronomy/PFS/src/drp_stella_data/tests/data/CALIB/ >
self.arcVisit = < 4 >
self.refSpec = < /Users/jds/Projects/Astronomy/PFS/src/obs_pfs/pfs/arcSpectra/refSpec_CdHgKrNeXe_red.fits >
self.lineList = < /Users/jds/Projects/Astronomy/PFS/src/obs_pfs/pfs/lineLists/CdHgKrNeXe_red.fits >
os.environ['OBS_PFS_DIR'] = < /Users/jds/Projects/Astronomy/PFS/src/obs_pfs >
<subprocess.Popen object at 0x114f36c90>
.
----------------------------------------------------------------------
Ran 1 test in 0.004s

OK
Could not import lsstcppimport; please ensure the base package has been built (not just setup).

Traceback (most recent call last):
  File "bin.src/reduceArcRefSpec.py", line 3, in <module>
    from pfs.drp.stella.reduceArcRefSpecTask import ReduceArcRefSpecTask
  File "/Users/jds/Projects/Astronomy/PFS/src/drp_stella/python/pfs/drp/stella/__init__.py", line 1, in <module>
    from stellaLib import *
  File "/Users/jds/Projects/Astronomy/PFS/src/drp_stella/python/pfs/drp/stella/stellaLib.py", line 34, in <module>
    _stellaLib = swig_import_helper()
  File "/Users/jds/Projects/Astronomy/PFS/src/drp_stella/python/pfs/drp/stella/stellaLib.py", line 30, in swig_import_helper
    _mod = imp.load_module('_stellaLib', fp, pathname, description)
  File "/Users/jds/Projects/Astronomy/LSST/stack/DarwinX86/base/12.0-4-g0d328d3/python/lsstimport.py", line 107, in imp_load_module
    module = orig_imp_load_module(name, *args)
ImportError: dlopen(/Users/jds/Projects/Astronomy/PFS/src/drp_stella/python/pfs/drp/stella/_stellaLib.so, 2): Library not loaded: libdrp_stella.dylib
  Referenced from: /Users/jds/Projects/Astronomy/PFS/src/drp_stella/python/pfs/drp/stella/_stellaLib.so
  Reason: image not found