Access the macOS High Sierra App Store page using Safari. If the "Get" button is active, it will download the "Install macOS High Sierra" app to your Applications folder.

Disclaimer: This post is for educational purposes. Always back up your data before installing any operating system.

Unlike modern versions of macOS that you simply download from the App Store, obtaining the full High Sierra 10.13.6 installer in a DMG file can be a bit more involved. Here are the most reliable methods:

It runs significantly better than newer macOS versions on older MacBook Pros, iMacs, and Mac Minis (roughly 2009–2017).

The update fixed an issue that prevented Photos from recognizing AVCHD media from some cameras, ensuring smoother import workflows.

Disclaimer: This article is for educational purposes. Always adhere to Apple’s software licensing agreements. The author is not responsible for data loss.