Apple has recently renamed its operating system OS X to macOS and has also revealed the name of its latest operating system which will be called macOS Sierra which is currently available for registered developers, the macOS Sierra is the latest version of macOS.
macOS Sierra bootable USB from Windows 10/8/7 PC
The macOS Sierra bootable USB can be prepared on a Mac without the help of third-party tools, just like how Windows bootable USB can be prepared from Command Prompt. However, if your Mac device is not bootable, you can prepare macOS Sierra bootable USB right from Windows PC as well.
Following are the things you will need:
# macOS Sierra DMG file
# A USB flash drive with at least 16 GB of storage
# A PC running Windows 10, Windows 8 or Windows 7
# Trial copy of TransMac (no need to download now)
Once you have all above mentioned things, you can make macOS Sierra bootable USB from a Windows PC. In this guide, we’re creating macOS Sierra bootable USB from Windows 10 but you can use the same procedure on Windows 8 and Windows 7.
Guide to prepare macOS Sierra bootable install USB from Windows 10/8/7
Step 1: Connect a USB drive which has at least 16GB of free space. Also move all the data from the drive to a safe place.
Step 2: Visit the link below and download the latest version of TransMac software on your PC. TransMac is a paid software but the 15-day trial copy can be used to prepare bootable USB without any issues. That said, if you often need to prepare macOS bootable USB from Windows, you should go ahead and buy the software.
Once downloaded, run the setup file to begin installation.
Step 3: Run TransMac software as administrator. To do so type TransMac in the start menu search box and then press enter. Right click on its entry and run it as administrator.
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 Sierra bootable USB. Right-click on the USB drive and then click Format Disk for Mac option.
Click Yes when you see a warning dialog box.
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. So we need to partition the USB drive with GPT partition first before transferring the DMG file to the USB drive.
Step 5: Clicking Yes button will open Format Drive for Mac dialog box where you need to type a name for the drive. Since we are preparing Sierra bootable USB, let’s name the drive as Sierra install drive.
Click Yes again when you see warning message.
Step 6: Once the format is done, right-click on the USB drive again, and then click Restore with disc image option.
Click Yes button when you see the following warning dialog box.
Step 7: Clicking Yes button will open Restore Disk Image to Drive dialog box. Under Disk image to restore section, click the small button with drive icon on it (refer to the picture below) to browse to macOS Sierra DMG file. Select the DMG file and then click Open.
Now click OK button.
Step 8: When you see the warning dialog box, click Yes button to begin preparing your macOS Sierra bootable USB. The bootable USB should be ready in about 30 minutes. In our test, the tool took close to 45 minutes, though.
Once the bootable USB of Sierra is ready, you can connect it to your Mac device and begin installing macOS Sierra from it.