I have run the ET tests on OS X. There are [https://build.barrywardell.net/view/EinsteinToolkitMulti/job/EinsteinToolkitMulti-sandbox/MACHINE=osx-10.9.5-macports,label=master/1430/testReport 5 failures]:
IOHDF5.test_recover/1procs SphericalHarmonicReconGen.SpEC-h5-test/1procs CT_MultiLevel.boostedpuncture/2procs IOHDF5.test_recover/2procs SphericalHarmonicReconGen.SpEC-h5-test/2procs
Several of the test failures seem to be related to HDF5 (see the output pages from the link above).
For example, I get these warnings:
HDF5-DIAG: Error detected in HDF5 (1.10.0) thread 0: #000: H5Dio.c line 170 in H5Dread(): can't read data major: Dataset minor: Read failed #001: H5Dio.c line 418 in H5D__read(): unable to set up type info major: Dataset minor: Unable to initialize object #002: H5Dio.c line 953 in H5D__typeinfo_init(): not a datatype major: Invalid arguments to routine minor: Inappropriate type WARNING[L1,P0] (IOHDF5Util): HDF5 call 'H5Dread (dataset, rec_info->hdf5type, H5S_ALL, H5S_ALL, H5P_DEFAULT, data)' returned error code -1
and the diffs say
phi.xl: substantial differences significant differences on 165 (out of 165) lines maximum absolute difference in column 2 is 1.4849088247045 maximum relative difference in column 2 is 3.18869248642747
for example, in IOHDF5.test_recover/1procs.
This might be because MacPorts is now using HDF5 1.10.0, and I don't know how much this has been tested with Cactus.