Can I watch HD/HDX on Apple laptops and desktops?
Yes, we support most Apple laptops and desktops to watch HD/HDX via a browser. However, most Apple laptops and desktops (Mac Mini and Mac Pro) do not support HDCP outputs to external monitors. If you're using a Macbook Pro or Macbook Air, you can watch HD and HDX using the laptop display. Otherwise, you will be limited to SD playback.
How strange, I wonder if they're not supporting external monitors on Macs for a stranger reason, since years before that page was posted on 03/29/2012 02:11 PM...
Mar 31, 2009 5:40 pm UTC
If you've been waiting for a way to connect your Mini DisplayPort-equipped Mac to an HDTV via HDMI, Monoprice has got you covered. The company has begun taking orders for its $14 Mini Display Port to HDMI Adapter, which are expected to begin shipping this Friday.
The adapter is most significant in that it finally allows protected HD content, like that available from the iTunes Store, to be displayed on an HDTV. DisplayPort, mini or otherwise, supports the HDCP encryption scheme designed to "prevent pirating" of HD content. Unfortunately for users of new Macs, most monitors don't support the standard—but luckily HDTVs do. Gizmodo got a unit to test and they say it works as advertised.
http://arstechnica.com/apple/2009/03/mini-displayport-to-hdmi-adapter-available- hdcp-compliant/