hdiutil convert /Volumes/OS\ X\ Install\ ESD/BaseSystem.dmg -format UDTO -o ~/Desktop/ElCapitan10.11.1.cdr Rename the .cdr file to .iso :
Double-click InstallESD.dmg to mount it. It will appear as a volume named “OS X Install ESD”. macosxelcapitan10111imageiso work
hdiutil create -o ~/Desktop/ElCapitan10.11.1.cdr -size 7.2g -layout SPUD -fs HFS+J -type UDTO -attach ~/Desktop/InstallESD.dmg Note: The above is an example. In reality, you need to use the mounted volume path. A more reliable method is: hdiutil convert /Volumes/OS\ X\ Install\ ESD/BaseSystem
Open Terminal and run: