Mountain Lion Usb Installer. Skip through the first few screens before selecting the relevant usb drive on the select a destination screen. For some mac users having the os x installer on portable media such as a dvd or flash drive is helpful when making a clean install on a startup drive.
There are many reasons why you may want to use a usb flash drive to install mac os x mountain lion. How to create a bootable macos usb. Re dowload os x lion open disk utility locate installesd dmg file from sharedsupport folder and double click it automatically the installesd dmg and mac os x install esd is going to mount in the disk utility application on the left side drag the mac os x install esd file to the source and drag your usb partition if you have more.
For example if you want to install mountain lion on multiple macs a bootable install drive can be more convenient than downloading or copying the entire mountain lion installer to each computer.
Hackintosh mountain lion supports amd and intel atom hackintosh mountain lion is distributed as an iso file hackintosh mountain lion works with regular dvds there are two versions usb version dvd 4 3 4 7 bootable installation requirements. Choose continue unibeast will then look for the mountain lion installer file in the applications folder and start copying it to the. How to create a bootable macos usb. By creating an el capitan recovery disc you can then create an installation disc and then access the app store for other free installers such as catalina and mojave.