In trying to write a brief post I ended up bring too cryptic. Let me clarify.
Concerning your first sentence, I have no idea where you found the information that one can obtain quality prints on a Mac using printer management.
I didn't mean to suggest that you'd get good prints doing that, or prints that matched the screen or whatever. I was only addressing one issue - whether you'd get a silent profile conversion when printing from Photoshop. Photoshop does this on both Mac and Win, but in different circumstances on each OS. If you print on Windows using printer managed color, then Photoshop will do a silent conversion to sRGB if the image is not already in sRGB. I'm fairly sure that this won't happen in OS X.
There were several Lula threads in which C'tein's views were discussed. He first advocated printer managed color, then recanted, and finally went back to it. In the comments section to those several threads there was an Adobe software engineer called Dave Polaschek who outlined when and why Photoshop does these silent conversions. Not easy reading, and his comments were scattered around the comments sections to C'tein's various articles. If you want to understand further, you'd have to locate his comments. Some of them are in the comments section to the post I linked to in my first post in this thread, but there were others as well.
I don't print using printer managed color, not do I recommend it, for all the reasons discussed in this thread. If the OP is on Windows then he should be aware of the silent conversion to sRGB, which will add to the problems of printer managed color. I only mentioned Qimage because it allows you to use printer managed color without a silent conversion.
And concerning your second sentence, I'm not sure what problems you are referring to with QuadTone Rip and B&W.
A common workflow with QuadToneRIP is to have the image in Gray Gamma 2.2. Since OS X 10.6.8, if you print such an image direct to QuadToneRIP from Photoshop then you'll get a silent profile conversion. I'm fairly sure that this is also discussed somewhere in Dave's comments. It's a fairly well-known 'feature' of recent versions of Photoshop & OS X. It's why the author of QuadToneRIP wrote a companion program Print Tool - to give OS X QuadToneRIP users back control over color management and profile conversion. It shouldn't be hard to find references to all this, perhaps on the QuadToneRIP support forum.
This is not an issue on Windows as you can't print direct from Photoshop to QuadToneRIP, and QTRGui is not a color-managed application.
I hope this clarifies things.