Third-party images can be modified to include keyloggers, malware, or remote access trojans (RATs).

To use a macOS High Sierra .rdr file, you must use software from the R-TT ecosystem.

file extension. This format is not an official Apple disk image like

Create a new VM, selecting "macOS" and "High Sierra (64-bit)".

While Apple often redirects to the latest version, they sometimes keep links for older installers, particularly for enterprise or specific hardware requirements.