i have growing library of physical flim and TV titles, some of which are on DVD, but the majority are blu-ray releases, nearly a dozen of which are 3D titles. I'm wondering if it's worth getting a external blu-ray drive, and I am considering the possibility of a Macintosh compatible external drive. I'd like to know if there are any external drives compatible with a 15 inch mid 2015 Macbook Pro laptop. running Apple's very lastest desktop operating system, MacOS Sierra, currently on the market in the UK, that can be used to playback commerically released region b blu-rays on such a computer. I wonder if I should go for a drive offering 3D support or one that only handles 2D blu-ray titles, since all 3D titles I believe also come with a 2D copy of the main feature. i gather that since Apple itself apparently still doesn't produce such an optical drive, what third party external blu-ray drives would fit the bill and if any incliude playback software, or if not, if there is any software that can be used with MacOS Sierra available free of charge online.