Step 3: Here, set the name for the flash drive we’re going with Untitled. Once the app opens, make sure that it is selected in the left section, and hit the Erase button up top. Step 2: Connect the aforementioned USB flash drive to your Mac, and then launch the Disk Utility app to format the connected flash drive. The app will be titled, “Install macOS High Sierra”. Step 1: To begin, download macOS High Sierra 10.13 installer app from the Mac App Store. Now that we have that covered, let’s proceed with the actual installation. Approximately 15-20 minutes of your time, and of course, the ability to exercise some patience as the process completes.The drive in question will be entirely formatted as part of the process, so if there’s any important data on it that needs to be kept, make sure it’s removed prior to beginning the process. A USB flash drive with a recommended minimum capacity of 16GB.You can find compatibility for High Sierra here: macOS 10.13 High Sierra Compatibility: Full List Of Macs Compatible With Apple’s Latest Desktop OS. A compatible version of Mac running any version of OS X/macOS.

How to make bootable usb mac os sierra