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: This method only works if your Mac model was originally compatible with High Sierra. Alternative: Using the Mist Utility

: A minimum of 15 GB to 20 GB of available internal storage.

Always fetch macOS installers directly from official Apple servers to avoid malware, corrupted data, or untrusted modifications. Method A: Official App Store Link (Recommended) download+macos+high+sierra+10136+dmg+mac+install

Apple’s macOS High Sierra (version 10.13) is widely considered one of the last "classic" macOS versions. It is the final major release to support 32-bit applications without compromise, making it a vital operating system for users with legacy software or older hardware like the MacBook Pro (2010/2011) and Mac Pro (2010-2012).

This link will open the Mac App Store directly to the High Sierra page, where you can click "Get" or "Download" .

Name the drive Untitled , format it as , and choose GUID Partition Map . Click Erase . Close Disk Utility and open the Terminal app. : This method only works if your Mac

Prerequisites

The Link will prompt your Mac to open the or Software Update preferences. Click Get or Download .

bypass "This copy of the install macOS application is damaged" errors that sometimes occur with older installers? Method A: Official App Store Link (Recommended) Apple’s

Before downloading the installer, verify that your hardware supports macOS 10.13.6. System Requirements Minimum 2 GB of RAM (4 GB or more recommended).

Optional: Select to erase your internal drive for a clean install. Select Install macOS from the main utilities menu. Click Continue and accept the software license agreement. Choose your target internal hard drive. Click Install and let the automated process finish. Troubleshooting Installation Errors Solutions for common issues encountered during setup. "This copy of the Install macOS application is damaged" Open Terminal in Recovery mode.

Cause: Apple's security certificates embedded within older installers expire over time.

She clicked Continue. Agree. Agree again. Select the internal drive. Install.

This topic covers the acquisition of macOS High Sierra (10.13.6)