In the macOS ecosystem, an .rdr file is not a standard Apple format like .DMG or .ISO. It is specific to R-Drive Image, a utility used to create byte-for-byte "Reflect" or "Drive Image" copies of a disk. These files are often shared in community forums (like r/hackintosh) to provide a pre-made, bootable environment for specific hardware. Status of 10.13.5 Downloads
Version Specificity: macOS High Sierra 10.13.5 was a minor update released in 2018 to add "Messages in iCloud" support.
Official Availability: Apple generally only provides the latest version of High Sierra (10.13.6) via the Mac App Store. You can still find the 10.13.5 Update and 10.13.5 Combo Update on official Apple Support pages, but these are patch files that require an existing High Sierra installation to run.
Archive Sources: If you specifically need a full image of 10.13.5, you may need to look at community-maintained mirrors like the Internet Archive. How to Get a Safe Installer
If your goal is to install macOS High Sierra, it is safer to use the standard Apple methods rather than third-party RDR images which may contain modified system files. Download macOS High Sierra 10.13.5 Update - Apple Support top download macos high sierra 10135 image file rdr
Finding a specific file for macOS High Sierra 10.13.5 is difficult because
is a proprietary format used by a specific legacy Windows tool (the R-Drive Image
software) often associated with outdated Hackintosh installation methods.
Most modern guides for installing High Sierra recommend using the official installer app or standard disk images like Official and Standard Downloads In the macOS ecosystem, an
If you need the installer to create a bootable drive or for a virtual machine, these are the most reliable sources:
Once you have a legitimate Install macOS High Sierra.app, you need to convert it into a raw disk image (.iso or .dmg) suitable for cloning with rdr tools.
Before diving into download strategies, let's revisit what made version 10.13.5 significant. Released in mid-2018, macOS High Sierra 10.13.5 was a stability and security patch that introduced:
For users running older hardware (Mac Pro 5,1, MacBook Pro 2012, etc.), 10.13.5 is often the "sweet spot" – stable, fast, and compatible with 32-bit applications that later versions of macOS (Mojave, Catalina, and beyond) deprecated. How to Convert the High Sierra Installer into
hdiutil create -o macOS_High_Sierra -size 8g -layout SPUD -fs JHFS+ hdiutil attach macOS_High_Sierra.dmg sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled hdiutil detach /Volumes/Install\ macOS\ High\ Sierra
For Windows/Linux users (to create a VM-ready ISO):
Use a tool like dmg2img:
# Convert the ESD.dmg to ISO
dmg2img -i InstallESD.dmg -o HighSierra.iso