hdiutil convert -format UDRW -o MyInstaller.iso /Volumes/MyVolume Be aware that .dmg files are UDRW (UDIF read/write image), so the -format UDRW option might not be needed. After conversion, verify the integrity of your .iso file. This step can be crucial:
mkdir ~/pkg-to-iso cd ~/pkg-to-iso First, you need to convert the .pkg installer to a .dmg (disk image) file. Not all .pkg files can be directly converted without installation, but we can try mounting it or directly creating an ISO. how to convert pkg to iso exclusive
If your .pkg file is actually a installer application ( .app wrapped in .pkg ), then you might directly use it. hdiutil convert -format UDRW -o MyInstaller