Apple sometimes removes old installers from the App Store, but High Sierra is often still available, or you may need to download it from the "Purchases" tab if you downloaded it before.
This converts the DMG file into a CD-R format (which acts as an ISO). macos high sierra 10136iso
The icon didn't look like a generic disk image. It was a classic, smiling Happy Mac face, but it looked… tired. The eyes were pixelated, and the smile seemed slightly strained. Apple sometimes removes old installers from the App
The "ISO" in macOS High Sierra 10.13.6 ISO refers to the file format used to distribute the operating system. An ISO file is a type of disk image file that contains the entire operating system, which can be mounted or burned to a USB drive. It was a classic, smiling Happy Mac face,