If you previously "purchased" or downloaded High Sierra when it was current, you can often find it in the Purchased tab of the Mac App Store.
If you are specifically looking to , this guide breaks down exactly what you need to know, how to find the files safely, and how to create a bootable installer. Understanding the "RDR Exclusive" Tag
For advanced users, the official softwareupdate command in the Mac Terminal can be used to fetch the complete installer directly from Apple's servers.
Apple maintains download links for legacy operating systems. If you have an older Mac compatible with High Sierra, open Safari and use the official Mac App Store link to download the High Sierra installer. It will download as a .app file in your Applications folder. Step 2: Create a Bootable USB Installer download macos high sierra 10135 image file rdr exclusive
Locate your macOS_High_Sierra_10.13.5.rdr file.
I can provide the specific commands or software settings for your setup. Share public link
Open and execute Apple's official creation command: If you previously "purchased" or downloaded High Sierra
Do not use "RDR Exclusive" or similar torrent sites if you value system security. Use Official Channels: Attempt to download the installer directly from the Apple Support Website or the Mac App Store using a compatible Mac. Upgrade if Possible:
: Downloading macOS installers from unofficial sources (“image files,” .dmg or .cdr files not signed by Apple) exposes you to malware, modified system files, and potential firmware-level compromises.
generally provides the latest version (10.13.6). To specifically get 10.13.5, you may need to use third-party scripts like installinstallmacos.py Apple Support Community Third-Party & "Exclusive" RDR Sources Apple maintains download links for legacy operating systems
If you prefer official channels or the RDR approach doesn't suit your needs, these methods are your safest, most reliable options.
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume