On page 464 of the CS6 PDF it states:
Send to Encore for DVD, Blu-ray Disc, or SWF file creation
You can send video from any sequence into Adobe Encore for output to DVD, Blu-ray Disc (Windows only), or a SWF file.
That middle phrase can't be true, or is it? I'm on a Mac running the Adobe Master Suite, and it never entered my head that I couldn't make a Blu-ray.
All it means is that you can't use the "Send to Encore" (dynamic link) for a bluray. Just open Encore and import an exported file. Many users prefer this to dynamic link for Bluray.
As to whether it is true (PC here), no idea.
You could also try opening Encore and use File -> Adobe Dynamic Link -> PR sequence to see if by some very odd circumstance you can dynamic link from that end. But I suspect not.
Edit: I did not find such a limitation in Encore help. The "windows only" appears only once in the pdf - unrelated to this topic.