We are naming it as Seirra install drive. Step 5: Clicking Yes button will open Format Drive for Mac dialog box where you need to type a name for the drive. So we need to partition the USB drive with GPT partition first before transferring the DMG file to the USB drive.

This is because, if you have been using a USB flash drive with Windows operating system, the USB drive is likely using MBR partition type. Right-click on the USB drive and then click Format Disk for Mac option.Ĭlick Yes button when you see the warning dialog box.

Step 4: Once TransMac is launched, in the left pane of the program, you will see the connected USB drive that you want to use to prepare macOS bootable USB. When you see the TransMac Trial dialog box, Click Run button.Īlternatively, you can navigate to TransMac entry in Start menu, right-click on it, and then click Run as administrator option. To do so, type TransMac in Start menu search box, right-click on TransMac entry in search results, and then click Run as administrator option. Step 3: Run TransMac software as administrator. Once the TransMac is downloaded, double-click on the setup file to run the installer and get it installed on your PC. That said, if you often need to prepare macOS bootable USB from Windows, you should go ahead and buy the software. TransMac is a paid software but the 15-day trial copy can be used to prepare bootable USB without any issues.

Step 2: Visit this page of TransMac and download the latest version of TransMac software on your PC.

How to make a usb drive bootable on mac