If you specifically need a DMG file for a virtual machine or to create a bootable USB on a non-Apple device, you can use the Terminal on a Mac to create one from the downloaded .app :
If you're trying to revive an older Mac or need a bootable installer, you’ve likely noticed that macOS High Sierra doesn't show up in the App Store anymore. Apple restricts these downloads to compatible hardware, but you can still access the official files using direct links. 1. The Official App Store Link download macos high sierra 1013 6 dmg file link
Before proceeding, be aware that downloading macOS installation files from third-party "mirror" sites carries risks. Files may be corrupted, outdated, or contain malware. The methods below are listed in order of safety and reliability. If you specifically need a DMG file for
To stay safe, users should prioritize Apple's official support pages and avoid any site that requires disabling system security features (like Gatekeeper) to run the installer. Conclusion The Official App Store Link Before proceeding, be
High Sierra is no longer receiving security updates. Many modern apps and browsers no longer support it. Only install it on older Macs that cannot run a newer version (e.g., 2009–2011 models with patchers).