Create A Bootable USB Disk for Catalina macOS

Recently, I needed to install the Catalina Mac System on my MacBooks. So I decide to make a bootable USB disk myself.

Let’s get started!

Prerequisites

  • USB flash drive: It has at least 16GB of storage and make sure the data inside is backed up.

Install Steps

  1. Open LaunchPad→ Disk Utility

2. Format/Erase USB driver

3. Open the Catalina.dmg, then drag the file macOS Catalina into the application folder

4. UseInstall Disk Creator to create an installer

Finished!

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