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This late in the game, someone with a dev build should be able to answer this.

I have a Blu-Ray player but no access to Leopard though.
 
Wait, DVD player will be able to play HD and blu ray formats, linkage anywhere...?
I don't see why not. All the devs have to do is program it to work with both. The challenge would be finding a Blu-Ray or HD-DVD drive that'll work with the Mac.
 
I haven't heard any stories of it actually working. I've heard that it should, but haven't seen any proof.
 
With one of the earliest builds I saw that the ability was added,

look through the mac rumors archive of stories,

I saw a story showing that HD/BR prefs had been added, but that it still wouldn't actually play the movies. If someone can confirm that they actually play, then please post here 🙂
 
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