Apple does not officially distribute files; they provide installers as .app bundles or .dmg files. To obtain a "proper" macOS ISO for use in virtual machines (VMs) or specific bootable media, you must either create one manually using Apple's official assets or use trusted community-developed scripts that automate the process directly from Apple's servers. 1. Legitimate Methods to Obtain a macOS ISO
A highly recommended open-source tool for Mac users. It downloads installers directly from Apple and offers a one-click option to output a properly formatted ISO Disk Image .
A popular Python-based script that works on Windows, Linux, and macOS. It fetches official installer files (like BaseSystem.dmg ) directly from Apple's servers.
Here’s a concise guide:
Open Terminal and create a blank DMG, then convert to ISO:
It’s important to clarify that like Windows. Apple’s official distribution method is through the App Store (as an .app installer) or Software Update , and these are not directly bootable as ISO images on non-Apple hardware.