CleanMyMac
This is how to perform a clean installation of macOS 12 Monterey.
Download CleanMyMac X free edition here:
Step 1: System backup & cleanup
Clear out system junk
Backup your Mac using Time Machine
Step 2: Downloading macOS Monterey
Download the installer via Software Updates.
Get the Beta profile here: https://betaprofiles.com/
Step 3: Create a bootable USB installer
The command line for Terminal (for Monterey Beta):
sudo /Applications/Install macOS 12 Beta.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled
Step 4: Erase your Mac and boot macOS from USB
Go to Recovery mode
Run Startup Security Utility to change security settings.
Boot from macOS Monterey USB installer
Erase your Mac in Disk Utility
Install macOS Monterey
The app I mention in this video: CleanMyMac X by MacPaw:
https://bit.ly/3DFevkK
The detailed guide to installing macOS Monterey:
https://bit.ly/3kOO7fS
Content:
00:00 – Intro
00:31 – What is a clean installation
00:59 – Back up and clean up the system
02:02 – Prepare the backup
02:35 – Download macOS Monterey
03:56 – Create the bootable installer
05:39 – Erase your macOS and install the new one
07:05 – Outro .