Third-party images can be modified to include keyloggers, malware, or remote access trojans (RATs).
If you are already running an older version of macOS (like Sierra), you can trigger the download directly via the Terminal: download macos high sierra 10.13.5 image file -.rdr-
: 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 Third-party images can be modified to include keyloggers,