If you already have a working macOS High Sierra installation that you want to clone and deploy elsewhere, you can use R‑Drive Image to create your own .rdr file. This is an excellent way to create a backup or a template for multiple systems.
The machine powers off.
softwareupdate --fetch-full-installer --full-installer-version 10.13.6 Use code with caution. download macos high sierra 10.13.5 image file -.rdr-
If you saw .rdr in a specific tutorial or software (e.g., some recovery tool, VMware, or Parallels), let me know – I can explain how to convert or handle that format. Otherwise, stick with Apple’s official .app installer. If you already have a working macOS High
: Windows users could download the single .rdr file, open Image for Windows, and flash the pre-made environment directly onto a USB stick without needing access to a real Mac. The Core Problem with .rdr Files Today : Windows users could download the single
And your Mac restarts not into Recovery, not into macOS, but into a black screen with a single blinking cursor in the top-left corner.