Run TransMac by Run as administrator Right-mouse the USB drive, choose Restore with Disk Image From the warning dialog box, just click on Yes Browse for the DMG file, then Click on OK button The whole process then takes a few minutes to finish Cheers!ĭMG file is a compressed file format being used widely on Mac computer. How to create Mac OS X bootable USB on Windows? You need to prepare an USB (8Gb or bigger). Your source for expert tips, special deals, commentary, reviews, and the latest tech news. DiskMaker X helps fill the void by allowing you to make a bootable OS X 10.10 Yosemite USB install drive, making a task such as installing on several different machines easier.