How To Create a USB Flash Drive Mac Os installer - any Version

How to download and install macOS

Download and install current or previous versions of the Mac operating system on compatible Mac coomputers.

Apple Server Site : https://support.apple.com/en-us/HT211683

From the Store : 

Sonoma 14

Ventura 13

Monterey 12

Big Sur 11

Catalina 10.15

Mojave 10.14

High Sierra 10.13

Download From Browser Older Versions :  

Sierra 10.12

El Capitan 10.11

Yosemite 10.10

Mountain Lion 10.8

Lion 10.7

Open Core Legacy Patcher - Mac Os USB Creator