apple how to create a bootable install for mac os

Apple Create A Bootable How To Create The

If you have multple Macs to upgrade, its a lot more efficient to plug in the USB installer drive and run the installer than to log into the App Store, download the 8.09GB OS installer, and then run it.

In this article Ill go over the different ways you can create a bootable macOS Catalina installation drive.

Apple Create A Bootable How To Create The

But before I give instructions on how to create the drive, Ill go over the items youll need and how to get them.

This will allow you to connect a storage device that uses a USB type-A connector.

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When creating the boot drive, the storage device is reformatted, so theres no need to format the drive beforehand.

Get the macOS Catalina installer software The macOS Catalina installer is available in the App Store.

Or, if you click this Catalina App Store link, it will take you to the Catalina App Store webpage, then click on the View in the Mac App Store button.

When youre ready to download the software, click the Download button.

If youve already downloaded the installer, the button will say Install instead of Get.) Apple Once the download is complete, the installer will launch automatically.

Instead, press Command-Q on your keyboard to quit the installer.

The Catalina installer app will be in your Applications folder, so you can go there and launch it later to upgrade your Mac to the new operating system.

Make a bootable installer drive: The quick way I used a free app called Install Disk Creator to make the installation drive.

When the download is done, you can move it over to your Applications folder.

Then follow these steps to create your bootable macOS Catalina drive.

Connect your drive to your Mac.

Launch Install Disk Creator.

In the main window, youll see a pop-up menu under Select the volume to become the installer.

If you have other macOS installers, you need to click on Select the OS X installer and select the Catalina installer.

When youre ready, click Create installer.

Your Mac may tell you that Install Disk Creator wants to make changes, and you need to enter your user name and password.

After you do this, the app will take a few minutes to create the boot drive.

A progress bar. appears at the bottom of the Install Disk Create window.

If you try to start the process and you get a failure message saying that the drive couldnt be unmounted, try reformatting the drive first as ExFAT using Disk Utility.

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Apple How To Create A Bootable Install For Mac Os