Yesterday I installed Windows 10 on my 2010 Mac Pro. It was a bit of a pain getting around Boot Camp's limitations, but I finally got it working. Once I'm in Windows 10 everything seems to work perfectly, but I am having a couple of minor issues getting into Windows. I noticed when I use Startup Disk to select the Windows partition and reboot I get the "no boot device available" message, however when I hold down alt/option and boot the Mac I see the Windows partition as "EFI boot". Clicking this "EFI boot" partition starts Windows without a hitch, and running msinfo32 shows that Windows did in fact boot using UEFI. My assumption is that Startup Disk is attempting to boot using simulated BIOS instead of UEFI, and since my disk is running GPT with protective MBR instead of hybrid GPT/MBR it can't find the boot drive. Ultimately I have two questions: Can I force Startup Disk to use UEFI instead of simulated BIOS? I thought about mounting the EFI partition and playing around in there, but I figured I'd ask the community before getting too in the weeds there. Can I change the "EFI boot" partition name in the boot menu to something more appropriate (such as "Windows")? I already changed it with gdisk in macOS/Windows, but the boot menu is looking at some other identifier.