Once your Mac boots into the new desktop, open the downloaded app on your internal drive.
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Wait for the app to download the official package directly from Apple servers. 4. Create the Bootable USB Drive Insert your 16 GB+ USB flash drive into the Mac. Click inside OCLP. Select the macOS installer you just downloaded. Once your Mac boots into the new desktop,
Follow the standard on-screen setup prompts to install macOS onto your internal drive. oclp download