Download Sierra through CLI
EDIT: Apple’s readded sierra to MAS https://itunes.apple.com/us/app/macos-sierra/id1127487414?mt=12 One of the changes that came with High Sierra’s release and affected fellow macadmins was the removal of Sierra from the app store. For now, there’s a work around as Apple still has Sierra in the Software Update Catalogue Sign into the Mac App Store with an account that had Sierra Download…