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A window similar to the one seen below appears: The DiskMaker X 9 Installer. Once you’ve located the installer, double click it to mount the disk image. By default, it should be in the Downloads folder. To install DiskMaker X 9, locate the installer disk image (.dmg) file. You can also create a single drive with installers for every Mac operating system back to Lion! Install DiskMaker X 9 Note that the developers of the app also have DiskMaker X versions available back to Mac OS X 10.7 “Lion”, which is helpful if you wish to load older Macs with their original operating system versions. Download DiskMaker X 9Ĭlick the DiskMaker X link in the first paragraph of this article and download a copy of DiskMaker X 9 to your Mac. With a blank external hard disk or flash drive at your fingertips, follow these instructions. The app is free, but a donation is suggested. You can always use the Mac Terminal app to create a bootable installation disk, but DiskMaker X automates the process.
CREATING BOOTABLE INSTALLER FOR MAC HOW TO
Diskmaker X has been my tool of choice for making bootable install drives for years, and in this article, I’ll show how to create one for macOS Catalina.
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While I was able to reload my MacBook from the bootable backup drive, I know that it’s always good practice to have one drive - a cheap flash or hard drive - that can be booted for one purpose, that of doing a clean install of macOS. My recent experience with water damage to my new 16-inch MacBook Pro reinforced two practices that I’ve followed for many years making a bootable backup and creating a bootable macOS install drive.