If your Mac doesn't have an integrated SuperDrive, use an external DVD burning tool. DVD dual layer is available wherever standard DVDs are sold.
The OS X Mountain Lion installer is just too big a thing to match the standard DVD. DVD dual layer has two layers, increasing the available recording space to about 8.5GB. You need a dual layer DVD (DVD with double sided recording) and a disc or USB drive. Copy the InstallESD.dmg file to the flash drive.Copy the installer Lion X Mountain Lion to the USB can boot.Burn the bootable DVD of the Lion X Mountain Lion installer.Locate the installation of Mountain Lion image.How to create OS X Mountain Lion installer on DVD or USB
