You may need a bootable macOS Catalina USB drive to cleanly install the operating system or downgrade the macOS beta version. You can follow the steps here to create a bootable disk for any available version. However, since macOS Catalina is the current stable release, let me show you how to make a bootable installer drive.
Before You Begin:
If you are in the process to install macOS Sierra 10.12 on your PC or Hackintosh, the first step is to create a bootable USB installer for macOS Sierra to install Mac OS from it on your PC, you can create bootable USB Installer with UniBeast, but still, you need a Macintosh to download and create macOS Sierra bootable USB Installer. First, you need the OS X or macOS installer on your Mac. Ideally, download the installer, but don't use it. When you download and use the OS X or macOS installer, the installer deletes itself as part of the installation process. If you've already installed OS X or macOS, redownload the installer. Use the Restore Disk Image to Drive dialog box to browse for the DMG file with the installation files for Mac OS X Yosemite in this case, and click the OK button to create a bootable USB of the operating system. Now, you’ll have to wait a long time. Jan 28, 2021 Select dmg macOS file to create a bootable USB drive Click the Open button. Click the OK button. Click the Yes button. Here’s how to create macOS Big Sur 11.0.1 bootable USB flash drive installer for a clean install on your Mac. With macOS Big Sur being Apple’s latest software release, and with the public waiting a long time for its release, there is definitely going to be a big rush to install it.
How to Create a Bootable macOS Catalina Installer Drive
Done!
The USB drive will be erased first, and then installer files will be copied to it. Erasing will be relatively quick. However, copying will take considerable time. Even if it is stuck at 0% or 10% for long, do not quit the Terminal window. The process is ongoing.
Signing off…
Note: If you have a Mac with T2 Security Chip (that is, Macs introduced in 2018 or later), first follow this guide to allow booting from external media.
Mac Bootable Installer
After you create the bootable USB drive, the process to install it is simple. Make sure the USB drive is connected to the Mac. Next, click on the Apple logo from the top left and choose Restart. When you hear the startup sound or see the Apple logo, immediately press and hold the Option key. Select the bootable installer as the startup disk, and follow the instructions.
How To Create A Bootable Installer For Mac Os Lion![]()
If you have issues, we have an extensive guide that addresses tips to fix when Mac Recovery Mode is not working.
The founder of iGeeksBlog, Dhvanesh, is an Apple aficionado, who cannot stand even a slight innuendo about Apple products. He dons the cap of editor-in-chief to make sure that articles match the quality standard before they are published.
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