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 Files may be corrupted, outdated, or contain malware.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.
hdiutil create -ov -format UDRW -volname "macOS High Sierra" -size 5g macos_high_sierra.dmgIf you have the .app installer from the App Store, you can create your own DMG using the Terminal . This is the most reliable way to ensure the file hasn't been tampered with. macOS High Sierra 10.13.6 full installer - Apple Community download macos high sierra 1013 6 dmg file link
.pkg file (e.g., InstallMacOSX.pkg). Run it.If you're using a Mac and want to upgrade to or download macOS High Sierra 10.13.6, you can do so directly from the Mac App Store. Here's how: Important Safety Warning Before proceeding, be aware that
32-Bit Application Compatibility: It is one of the last macOS versions to fully support 32-bit applications, making it essential for users who rely on older professional software that doesn't run on newer, 64-bit-only systems like Catalina. Open the "Terminal" app
Tools Required: A Mac and a USB drive (8GB+) or a blank disk image.
Downloading macOS High Sierra 10.13.6: A Step-by-Step Guide
If you already have an earlier version of High Sierra (10.13.x) and want to update to 10.13.6, you can download the macOS High Sierra 10.13.6 Combo Update DMG Standard Update (DMG): For users already on version 10.13.5, the macOS High Sierra 10.13.6 Update DMG is a smaller file. Apple Support Alternative Download Methods