: Creating an installer can take 10–30 minutes. Method 1: Creating the Installer on a Mac (Recommended)
If you already have a functioning Mac, using the built-in is the most reliable and officially supported method. 1. Prepare the USB Drive create mac os x bootable usb installer from dmg
: Downloaded from the Apple Support website or an official source like the Mac App Store. : Creating an installer can take 10–30 minutes
creating a bootable drive from .dmg - Apple Support Community create mac os x bootable usb installer from dmg
: At least 16GB of storage (32GB is safer for modern macOS versions).