How to Create a Mac OS USB Boot Drive on Windows
10,179This tutorial will help you create a bootable USB flash drive for your Mac on a Windows computer using Transmac.
Please visit https://www.kevinmuldoon.com/create-macos-boot-drive-windows/ for a more comprehensive overview of the steps you need to perform.
In order for this to work, you need a USB flash drive. The one I used in my tutorial was 16GB in size, but it should work with any flash drive that is 8GB in size or higher.
Open command prompt as an administrator and enter the following commands to convert your USB drive from MBR to GPT format:
diskpart
list disk
select disk X (where X is the number of your USB flash drive)
clean
convert GPT
create partition primary
Transmac can be downloaded from AcuteSystems.com at http://www.acutesystems.com/scrtm.htm
The application costs a one-off fee of £59, however, you can use Transmac without any restrictions for 15 days. That's more than enough time to do what you need to do.
Another program that you might find useful is HFS+ for Windows (by Paragon Software). It's available at https://www.kevinmuldoon.com/go/paragon-hfsplus-windows and is compatible with Apple Boot Camp software. It also gives direct read and write access to Mac partitions.
The DMG file for Mac OS X can now be downloaded free of charge from Apple.
Mac OS X El Capitan - https://support.apple.com/en-gb/HT206886
Mac OS X macOS Catalina - https://support.apple.com/en-gb/HT201475
Mac OS Downloads - https://support.apple.com/en_US/downloads/macos
Once you have your USB boot drive, you can boot up from the drive by inserting the USB drive into your Mac and then pressing the option (⌥) key as soon as your computer loads. This will allow you to select which drive you boot from.
If you see the no/prohibited/forbidden symbol after selecting your USB drive to boot (it's like a circle with a line through it i.e. ø), try and go back into the recovery area by pressing command and R when your Mac is loading and unmounting the drive.
There is a good discussion about this issue at http://forums.macrumors.com/threads/when-booting-from-usb-i-get-circle-with-line-through-it.1411034/
Some people had better luck entering into safe mode using command and S - see the discussion at http://forums.macrumors.com/threads/circle-slash-prohibitory-sign-and-spinning-gear-no-boot.683873/
There is a lot of great information about the prohibited symbol at https://bombich.com/kb/ccc4/help-my-clone-wont-boot too.
I'd love to hear your thoughts on this so please leave a comment below. As always, if you enjoyed the video, please click like, share, and subscribe :)
Thanks guys.
Kevin
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