I've been reading up on people's experiences with external gpu's, but have a few issues I'm not sure of. Background: I have a 2012 rMBP thats Thunderbolt 1 & HDMI 1.4. I'd like to be able to drive a 3840x2160x60Hz, but can't do that through the thunderbolt/dp prots or the HDMI port. So I'd like to explore the option of a thunderbolt enclosure with a DP 1.2 capable gpu rather than buying a new laptop. 1> If I'm understanding correctly what I read, it seems like folks are using exxternal gpu but mostly under Windowns with the monitor hooked to the internal ports. Can I actually drive a monitor off the external gpu directly, under OSX? 2> Would disconnecting the external gpu require a full powerdown sequence, or does hotplugging / unplugging actually work? Apologies if these were addressed somewhere else - I did read through most of the threads I could find but might have missed something. Thanks!