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Hi,

I have a old Mac Pro 5.1 (2010 model) and use this Blu Ray drive:

LG BH16NS40

It fits fine into the second drive bay of the Mac Pro. I had to remove the front bezel from the drive's drawer. But since this part is intended to be removed, it was easy as pie. :)

I would guess that Lite-On Blu Ray drives fit as easily into the Mac Pro because there is no special Mac Pro form factor. Any Blu Ray drive should fit.
 
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