For advanced users, you can download a verified copy via Apple’s content distribution network (CDN) using the terminal:

Given these considerations, here's a sample post that focuses on verified, safe methods:

But Apple’s official download links now redirect to newer OS versions. Getting the requires careful steps—especially if you need a verified copy (checksums matched to Apple’s originals).

: Provides mirrors for various versions of macOS High Sierra .

Downloading a "verified" macOS High Sierra 10.13.6 DMG from unofficial third-party sites carries significant security and stability risks

If you are currently on a Mac, use this method to download the full installer directly from Apple.