Hi all I own a 2013 Retina MacBook Pro and am thinking about removing OS X completely and running Windows 10 as my primary OS. However, there are a few apps (Logic Pro, etc) that I would want to use OS X for. Question is whether I can completely remove OS X from the system drive (this should be fine) but be able to install it to an external USB 3.0 SSD for the times I'd like to use it? Does OS X necessitate being installed on the primary disk? Please save the "why on earth" questions – having used OS X since Leopard, I've become increasingly frustrated by it lately. I find Windows 10 to be a slicker and more productive OS for my requirements.