Make update script Sierra-friendly
Make update script Sierra-friendly

samepage-labs/osx-templates,boxcutter/osx,boxcutter/osx,boxcutter/osx,samepage-labs/osx-templates,samepage-labs/osx-templates,samepage-labs/osx-templates,boxcutter/macos,boxcutter/osx,boxcutter/macos,boxcutter/osx,boxcutter/macos,boxcutter/macos,boxcutter/macos,samepage-labs/osx-templates