How to download and Create an USB installer for macOS

How to download and install macOS

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

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