If you want to create a bootable USB drive from the downloaded image file, you can use tools like:
“Mac OS X High Sierra 10.13.5 (17F77) Official Apple Installer” – Ensure uploader is “Apple Certified” or has high community ratings. download macos high sierra 10135 image file rdr hot
Are you planning to install this on or are you setting up a Hackintosh build? If you want to create a bootable USB
On modern Macs (Mojave or later), you can often download full installers via Terminal using: softwareupdate --fetch-full-installer --full-installer-version 10.13.6 Analysis of the "RDR" Image File Download macOS High Sierra 10.13.6 Update - Apple Support installers through the App Store, the "rdr" format
: The term "Hot" in your search may refer to the Hot menu bar application , which monitors CPU thermal throttling—a common concern when running older OS versions on intensive hardware.
installers through the App Store, the "rdr" format is a compressed disk image specifically designed for R-Drive Image