DiskMaker X Pro is a multi-macOS install disk that allows you to restore any OS in a few clicks. You just need to follow the instructions, copy your installers in the right folder, and within a few minutes, you’ll get a disk with every macOS / OS X installer released in the past seven years, each one being bootable. And each OS will only take the space needed on the drive, keeping all the remaining space of the disk in an Other_Stuff partition so that you can keep other tools as well.
