Download [portable] Macos High Sierra 10.13.5 Image File: -.rdr-

Open and format the USB drive as Mac OS Extended (Journaled) with a GUID Partition Map . Name the volume Untitled .

Why you should avoid macOS .rdr files from untrusted sources: download macos high sierra 10.13.5 image file -.rdr-

Create a new VM, selecting "macOS" and "High Sierra (64-bit)". Open and format the USB drive as Mac