Why this version matters: macOS High Sierra 10.13.6 is more than just an old operating system. It is the final version of High Sierra, representing the last update before Apple transitioned to macOS Mojave. For many users, it serves as a critical bridge: it supports APFS (Apple File System), optimizes Metal 2 graphics, and—most importantly—still runs 32-bit applications, which later versions of macOS dropped entirely.
date 0925120018 Then run the installer. After installation, reset the date automatically:
Share your experience in the comments below—but remember to respect copyright and only share official Apple sources. Last updated: 2026 – This guide follows Apple’s software distribution policies. macOS High Sierra is provided as-is, and no longer receives security updates. Use at your own risk, ideally on an offline or isolated machine.
Whether you are reviving a vintage Mac Pro, running legacy music production software, or simply prefer the skeuomorphic charm of High Sierra, having a verified 10.13.6 DMG on hand ensures you can always go back to one of Apple’s most stable and versatile operating systems.
Open Terminal and set the date back to 2018:
