: hdiutil attach /tmp/HighSierra.dmg -noverify -mountpoint /Volumes/install_build

If you are on a newer Mac (M1/M2/M3), the App Store may block the download. Use Mist to download official Apple installers directly. 🛠️ How to Create a High Sierra ISO

Enhanced graphics performance and introduced support for virtual reality (VR) and external GPUs (eGPUs).

hdiutil convert /tmp/HighSierra.cdr.dmg -format UTOE -o ~/Desktop/HighSierra.iso Minimum Hardware Requirements

It’s important to clarify upfront: Apple distributes macOS through the Mac App Store as a .app installer or as a disk image ( .dmg ) for creating bootable USB drives. Any “macOS High Sierra 10.13.6.iso” file you find online is almost certainly unofficial, third-party converted , or potentially malicious.