: They are not official Apple files . Apple provides installers through the Mac App Store or as standard .dmg and .pkg files via Apple Support .
Download macOS High Sierra 10.13. 5 Combo Update - Apple Support. Apple Support How to Create macOS High Sierra Bootable USB for Reinstall
If "rdr exclusive" is important
The RDR version is not publicly available for download, and it's usually only accessible to authorized personnel with a valid Apple ID and password. However, we've managed to provide a working solution for those who want to download and install the macOS High Sierra 10.13.5 RDR exclusive image file.