How to put OSX Mountain Lion (10.8) on a single-layer dvd

Posted on by Andy

Hello,

the downloaded Mountain Lion image has a total size of 4.8 GB which is too big for a single-layer dvd, but if you open the image and check the size of all files you only have 4.1 GB. So here is what you have to do to get the files on a normal dvd.

  1. Open the terminal and go to the folder where the installer dmg is located (InstallESD.dmg)
  2. Convert the dmg file to an iso file with
    # hdiutil makehybrid -o MountainLion.iso <dmg file>
  3. Now take the iso file and burn it normally to the single-layer dvd

That should be all, have fun with the new OS 😉