How do I do a clean install of OSX Catalina from bootable USB?

How to install macOS from a bootable installer

Plug in your bootable installer.
Turn off your Mac.
Press and hold Option/Alt while the Mac starts up – keep pressing the key until you see a screen showing the bootable volume.
Choose the bootable installer volume.
Click Continue.

How do I make a bootable Mac Catalina USB?

Make a bootable installer drive: The quick way

Connect your drive to your Mac.
Launch Install Disk Creator.
In the main window, you’ll see a pop-up menu under Select the volume to become the installer.
Under the pop-up menu, you’ll see Select the OS X installer.
When you’re ready, click Create installer.

How do I create a boot USB?

Click the boot file and drag it into the USB drive’s folder. Close the folder and restart the computer. Wait to see if your computer automatically attempts to boot from the USB drive. Restart the computer again if it doesn’t boot from the USB drive.

How do I format a bootable USB?

Step 1. Right-click on the bootable USB drive and select “Format partition”. Step 2. A mini window pops out, on which you can edit the partition label and choose a file system such as FAT/FAT32, NTFS , EXT2/EXT3. Step 3. Click “Apply” and format the bootable USB drive.

How do I make a startup USB?

Insert the USB flash drive in the computer’s USB port. Windows automatically detects the drive and creates a temporary drive letter for it. Click the Windows “Start” button in the taskbar and type “cmd” in the text box. Press “Ctrl,” “Shift” and “Enter” to open the Command Prompt in Admin mode.

How to boot Mac from USB?

Power on the system.

Press and hold the Option (Alt) key on the keyboard when the computer starts.

Select the USB drive as a startup disk when the option appears.

The system will start the boot process off the USB drive.

Install the operating system from the macOS utilities.

Data can be restored by using the Time-Machine backup option.