Macosxelcapitan10111imageiso Work May 2026

hdiutil convert /Volumes/OS\ X\ Install\ ESD/BaseSystem.dmg -format UDTO -o ~/Desktop/ElCapitan10.11.1.cdr Rename the .cdr file to .iso :

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: macosxelcapitan10111imageiso work

Open Terminal and run:

sudo dd if=/dev/rdiskN of=~/Desktop/ElCapitan10.11.1.iso bs=1m (Replace rdiskN with your USB’s raw disk identifier – use diskutil list to find it.) hdiutil convert /Volumes/OS\ X\ Install\ ESD/BaseSystem