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star-affinity

macrumors 68000
Original poster
Nov 14, 2007
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1,335
I have managed to install Windows 10 on a separate drive and the Boot Camp drivers (I know they are not for use with Windows 10) and I can start up into Windows 10 and launch the Startup Disk tool there, but the changes doesn't stick. It only works if I do this in OS X. I guess it might have to do with the rootless restrictions in El Capitan or something?

So, the problem is if I change the startup disk to be the drive with Windows 10 I don't have a way to go back into OS X after that, since I can use the Startup Manager (i.e. holding down alt during boot) since the graphics card I use (non-Mac version) doesn't give any video during that phase.

Any ideas?
Anyone here who's using a MacPro5,1 with Windows 10 and OS X and a non-Mac graphics card?
 
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