When I connect my Western Digital My Book 2TB For Mac to my TV via USB, it spends a view seconds "loading USB..." but then it just stops and nothing happens. It hasn't loaded, and I can't access it via the TV menu options.
I had a WD 1TB (not specifically for Mac - it works on both Mac and PC), and when I connected it to my TV there was no problem at all.
I went through all the trouble-shooting on the WD settings, and according to my computer it's working fine. It just doesn't load on my TV.