The is preferred for the following reasons:
: Apple does not distribute macOS as ISO files directly. They provide installers through the App Store. For High Sierra specifically, Apple has removed it from general visibility, but you might still access it via direct App Store links if you previously "purchased" it (it was free).
High Sierra uses the APFS (Apple File System) for SSDs. Ensure your drive is formatted correctly in Disk Utility before starting. macos high sierra 10.13.6 iso download
This paper is for educational and informational purposes only. The generation and distribution of macOS ISO files are subject to Apple’s End User License Agreement (EULA). Users are advised to download software only from official sources and to utilize these tools only on hardware they own or are authorized to manage.
Leading to installation failures or "Gray Screen of Death" errors. The is preferred for the following reasons: :
macOS High Sierra (version 10.13) was released by Apple Inc. on September 25, 2017. The 10.13.6 update, released in mid-2018, served as the final iteration of this operating system version. For IT professionals and developers, the ISO (International Organization for Standardization) image of this operating system is a vital tool. Unlike the standard Install macOS.app provided by the App Store, an ISO file offers a universal, mountable disk image suitable for virtualization software and cross-platform file transfer.
Apple does not officially provide macOS High Sierra 10.13.6 as a direct ISO file [29]. Instead, they provide the full installer via the App Store, which you can then use to create your own ISO or bootable USB [6, 10]. How to Get the High Sierra Installer To download the official installer, you generally need a Mac that is compatible with High Sierra [6, 31]. Download from the App Store High Sierra uses the APFS (Apple File System) for SSDs
Always verify the SHA-1 or MD5 checksum of any third-party ISO against official records to ensure the file's integrity. Installation Tips