A progress bar across the bottom of the app will tell you how far you have to go, and a pop-up notification will let you know when the process is done.
Once you're ready to go, click "Create Installer" and wait. You can navigate to a different installer if you want, and you can also pick from all the storage devices and volumes currently connected to your Mac through the drop-down menu at the top of the window.
UNIVERSAL USB INSTALLER FOR MAC DOWNLOAD INSTALL
Install Disk Creator will automatically detect macOS installers on your drive and suggest one for you, displaying its icon along with its path. Apple rolls support for newer hardware into new macOS point releases as they come out, so this will help keep your install drive as universal and versatile as possible. If you want to use this USB installer with newer Macs as they are released, you'll want to periodically re-download new Catalina installers and make new install drives. There are other apps out there that do this, but this one is quick and simple.
UNIVERSAL USB INSTALLER FOR MAC DOWNLOAD UPDATE
The macOS 10.15 Catalina installer from the Mac App Store (in High Sierra or older macOS versions) or the Software Update preference pane in Mojave.A USB 3.0 drive will make things significantly faster, but an older USB 2.0 drive will work in a pinch 8GB drives worked for Mojave and older versions of macOS, but the Catalina installer is just a little too large to fit. A 16GB or larger USB flash drive or a 16GB or larger partition on some other kind of external drive.We've created a USB stick from both Mojave and Catalina, but your experience with other versions may vary. A Mac that you have administrator access to.Luckily, it's not hard to make one-either with a handy graphical user interface or some light Terminal use. Further Reading macOS 10.15 Catalina: The Ars Technica reviewĪpple hasn’t shipped operating systems on physical media in a full decade, but there are still good reasons to want a reliable old USB stick for macOS Catalina.
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