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. macos iso
However, if you need an ISO file for virtualization (e.g., VMware, VirtualBox on a Mac or PC), you typically from the official installer. Open Terminal and create a blank DMG, then