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After downloading the DMG or installer app, you need to create a bootable USB drive to clean install or upgrade. Step 1: Format the USB Drive Insert a 16GB+ USB flash drive. Open . Select the USB drive, click Erase . Choose Format: Mac OS Extended (Journaled) . Choose Scheme: GUID Partition Map . Step 2: Create the Bootable Drive Open Terminal. Use the createinstallmedia command: download macos high sierra 1012 dmg exclusive

When looking for an "exclusive" or direct download, to avoid malicious or corrupted software. Third-party sites exist (like sysin.org Blog Downloads), but they carry risks. 1. Official Apple Links (Safest) To download the macOS High Sierra (10