Make a bootable image copy of OSX 10.8 Mountain Lion after downloading the App from the store but before installing on your drive. Copy the image to a local drive or make a bootable external disk or DVD.
Purchase Mac OS X Lion installer on the Apple Store When it was still Lion DiskMaker, DiskMaker X had the ability to burn DVDs too. Older versions are available here. Mac OS X 10.8 Mountain Lion v. 10.8.5 Full OS Install - Reinstall / Recovery Upgrade Downgrade / Repair Utility Factory Reset Disk Drive Disc CD DVD Brand: Fast Macs Repair 3.9 out of 5 stars 70 ratings. OS X Mountain Lion is available now as a download from the Mac App Store. Just click the Mac App Store icon in your dock, purchase Mountain Lion and follow the onscreen instructions to install it. Mountain Lion will not only make your Mac work better, it also makes your Mac work even better with your iPhone, iPad and iPod touch. Because it comes with iCloud, your mail, calendars, contacts. Image via arstechnica.net Step 4: Drag your USB (or a Dual-Layer DVD) drive from the list on the left into the 'Destination' box and click 'Restore' (or just click the 'Burn' button in the upper left if you're using a Dual-Layer DVD) and in 10-30 minutes (depending on whether you're using USB 2.0 or 3.0) you'll have your backup disk ready to instal on as many Macs as you like.
After downloading the Mountain Lion.App from the store aka 'Install Mac OS X Mountain Lion', find it in the /Applications directory, control click it to bring up a contextual menu and select 'Show Package Contents' from the menu.
show package contents
This brings up a Contents folder, from here navigate to Contents/Shared Support/InstallESD.dmg, and thats the disk image to burn, it contains all the goodies.
Double click it, you can skip the verifying process, then the disk image mounts as a volume in the sidebar.
Image to Bootable DVD
Select the mounted volume in the sidebar then either click on the burn icon if you have it set up or choose the option from the File menu, pop in a blank DVD and thats a job done.
make-a-bootable-mountain-lion-image
Apple Mac Os X Mountain Lion 10 8 Install Disc Herniation
You can also use /Utilities/Disk Utility to do the same thing, just launch Disk Utility, highlight the InstallESD.dmg and burn. Macbook number pad.
Copy to Local Drive
To keep a separate image of the dmg, option drag a copy to your desktop, this will make a copy of the InstallESD.dmg leaving the original Lion app intact. Mobile app run in pc software.
Image to a Bootable External Disk
Apple Mac Os X Mountain Lion 10 8 Install Disc Brakes
To make a bootable image to a drive instead of a disk, you need to do a restore in Disk Utility, select the InstallESD.dmg as the source and the disk volume as the destination. Enusure that the destination volume is correctly formatted as HFS+ Extended Journaled. Click 'Restore'.
Apple Mac Os X Mountain Lion 10 8 Install Disc Brake
If you haven't got the Mountain Lion App to start with and can't re-download it from the App store, you can still make a partial boot drive from the hidden Recovery Partition, check it out.
