

Download macOS Sierra from the App Store onto the Mac and have the Installer app located in the /Applications/ folder – you can re-download it from the Purchases tab if need be.USB flash drive (8GB or larger), this will be formatted and become the MacOS Sierra installer volume.The basic requirements necessary to make a boot macOS Sierra installer are as follows:

This walkthrough will demonstrate the exact steps necessary to create a boot installer drive for the final version of macOS Sierra using a USB flash key or a similar thumb drive.
