but all the fear mongering has me worried about bricking the mobo, so I'm trying to install in legacy mode.īooting up using alt to get the legacy mode version, the legacy installer doesn't work with the nvme controller. I was easily able to install win 10 in efi mode using the dvd on annvme drive. Hey tsialex, where's your warning about not installing in efi mode? p I get a text message on the black startup screen that a boot manager could not be found, and then booting into an OS continues automatically. According to the following Microsoft page it looked like removing the bootmgr file might do it, but the DVD would not boot at all when I removed the bootmgr file. So I tried to modify the Win10 iso to create an installer DVD without any BIOS booting in hope it would then boot UEFI. I tried all sorts of versions of the Bless command from the terminal, but everything I tried to bless the EFI folder or EFI files only resulted in booting legacy-BIOS. It only shows the Installer DVD with a single Windows icon, and that boots into legacy-BIOS mode. You also can't choose from the Startup Disk preferences pane.

If you simply allow the DVD to boot automatically (by holding the C key while restarting) it ALWAYS boots in the legacy-BIOS mode. Win 10 will automatically be installed to boot in the same mode chosen to boot the Installer.īut when a Mac Pro video card can’t produce a boot screen you can't choose.

Holding the Option key while restarting a Win 10 Installer DVD produces two Installer boot choices on the Boot Manager Screen - UEFI or Windows (legacy-BIOS). My Objective - to force a Win 10 Installer DVD to boot in UEFI Mode on a 2010 Mac Pro without a boot screen

Burn windows 10 iso to dvd mac