DiskMaker X Pro is DiskMaker X, on steroids. Provide the installers, name your disk DMX-Target and launch DiskMaker X Pro. Follow the instructions, copy your installers in the right folder, and within a few minutes, you’ll get a disk with every macOS or OS X installer released in the past seven years (from Mavericks to Catalina), 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. DiskMaker X Pro is a perfect tool for Apple technicians performing on-site repairs, allowing to restore any OS in a few clicks.