• Complete this download registration form to get access to all of our EFI digital printer and productivity software downloads.
• Make sure to boot from the USB device again, and select Boot OS X Install from Install macOS Catalina once again, in verbose mode. The installation is a two-part process that continues once you re-boot into the USB drive. Finally, after about 25 more minutes, OS X.

If that's the case, click the Utilities menu and, when Disk Utility opens, choose the hard drive you want to install macOS on and click the Erase tab. Make sure Mac OS Extended (Journaled) is. Deleting the Windows EFI Boot Entry. This is the most accurate and I have succeeded! First, you’ll need to locate the EFI partition, which is where your Mac stores information about what operating systems can be booted from your Mac. In the Terminal, type this command: diskutil list You’re looking for a partition on your main hard drive.

You are breaking quite a few rules.

Efi Pc For Mac Os Catalina

• 2014 iMac supports EFI and legacy BIOS, 2017 iMac does not. Post the output of sudo fdisk /dev/diskN where 'N' points to the external SSD. You can find 'N' by looking at the output of diskutil list.
• Your Windows drivers are hardware specific. The 2014 and 2017 iMacs have different GPUs, even if the same drivers 'work'.
• Portable installation of Windows is part of Windows-to-Go under Windows Enterprise. WE is not supported on Macs. Your retail 'license' is fairly clear about this.
• If you installed W10 on the 2017 first, there is an EFI partition on your internal disk with a Microsoft directory.
• You may end up with a corrupt BCD sooner than later, which will cause new issues. I suggest you backup Windows on a regular basis.

Mount Efi Mac Os

Nov 8, 2017 3:19 PM