Hi, I managed to install a boot camp partition on an external SSD with Win 10 Pro. Great solution, I could plug this into any Mac and use Windows when required. When I then tried to install Mac on its own partition on the same external drive, I obviously failed to do so. The Mac requires to have GUID partition scheme in place which the drive then doesn't have as it had been set up to run Windows. I then tried it the other way around, installing Mac on the drive first, run this externally and then run the Boot Camp Assistant. This doesn't work either as the assistant insist on installing Boot Camp on the internal drive although it shouldn't make a difference to the Mac as the external drive now becomes the primary startup disk for the Mac. Since you can do this internally, isn't there a way to have this set up on an external drive? Thanks.