
(If you want to support the developer, you can purchase the full version.) Quick note: TransMac is a paid software, but it has a 15-day trial solution, that give us more than enough time to move the DMG files to the USB drive from Windows. Search for Command Prompt, right-click the top result and select the Run as Administrator option.

Use these steps to set up a USB drive with a GPT partition: To do this, you’ll need to use the Diskpart command-line utility on Windows 10.
#Portable os x usb on windows mac os x#
Create Mac OS X bootable USB installation mediaīefore you can use TransMac, you first need to partition your USB flash drive with a GPT partition, as a normal MBR partition may not work. Now that you have all the necessary ingredients, you’re ready to make a Mac OS X bootable USB using the DMG file of the operating system with the steps below.
#Portable os x usb on windows upgrade#
These instructions will also work for Windows users who are running Mac OS X on a virtual machine and need to upgrade to the latest version. However, if you find yourself on a scenario where your device (iMac, MacBook Pro, Air, Mac Pro or Mini) is not responding and you happen to have a Windows 10 device, then you can still be able to make a USB bootable installation media for your Mac OS X to reinstall the operating system using the Recovery Assistant.

This is why it’s recommended that you make a Mac OS X bootable USB when your Mac is in working conditions. If you’re still using a Mac OS X the time will come when your computer won’t boot, or a problem may arise where you can’t take control of the device, and booting from an OS X installation media will be required.
