Use an external drive or secondary volume as a startup disk from which to install macOS.
Procedure for creating a bootable install… - Apple Community
Create a bootable USB stick for MacBook P… - Apple Community
How to start an old Mac. : r/mac
How do you upgrade from High Sierra to Mojave?
Need Bootable USB for SIERRA !!! - Apple Community
Use an external storage device as a Mac startup disk - Apple Support
Boot Camp Assistant User Guide for Mac - Apple Support
Macbook Air can't install macOS in recovery menu (after Big Sur update screwup) - Hardware - Spiceworks Community
macOS Sonoma USB Drive Speed Issues - ove… - Apple Community
iMac Boot Loop MacRumors Forums
Complete Guide on How to Create A Bootable Installer for macOS
Working guide to reinstall MacOS on Mac Pro 3.1 (2008)?
How to create an OS X El Capitan install disk on a flash drive - Quora
Failed To Personalise the software update… - Apple Community
