Type the following command to mount the recovery HD:ĭiskutil mount readOnly /dev/Ĥ.
It will be something of the form diskXsY, where X and Y are numeric digits, for me the identifier was disk0s3ģ. Look for ‘Recovery HD’ in the list, and note its identifier. Open the Terminal, and type this command to list all partitions on your hard drive or SSD:Ģ. Here is how i obtained my InstallESD.dmg From my Macbook Air:ġ. I found some old instructions on Macworld aimed at doing the same for OSX Lion on a Macbook Pro also worked for OSX Mountain Lion on my Macbook Air. It turns out you can extract a full OS X 10.8 Mountain Lion install disc from your Macbook Air / Pro quite easily. So i needed some way to obtain the InstallESD.dmg, this would allow me to burn it to disc (if my Air had a DVD drive) create an installable USB stick for OSX or simply create an ISO so i can burn the install DVD on Windows. However as OS X 0.8 Mountain Lion came installed on my Macbook Air i could not obtain the InstallESD.dmg from the App Store.
I own a Macbook Air and wanted to extract an OS X 10.8 Mountain Lion InstallESD.dmg from the Air.
