It makes very little logical sense to most (for obvious reasons), but that that one Mac is no longer able to communicate with said HD due to the SATA card. The case being, your other Macs will read/ write to this HD fine, but this one Mac wont. (and you swapped out HD USB cables too on the 'bad' HD?).Īfter swapping cables between the '2 identical WD USB HD', you have (nearly 100% certainty) a bad SATA card as I stated much earlier.
