How To Make A Bootable Disk Or USB Drive Of OS X Mountain Lion
Important warning: the OS X installer will delete the necessary file needed to make your own install disk once it runs. Therefore, you need to either make a copy of the installer outside of the Applications folder or make your install disk before upgrading.
We recommend a USB flash drive for your backup installer; they're cheap and easy to store and transport. Other external drives will also work, but make sure the type works with all your Macs—USB is the most universal. You can also burn the installer to a DVD-R, but booting and running the installer from an optical disc is s-l-o-w. His app automates the process of making a bootable install disk for both Lion and Mountain Lion—just run the app and let it do its thing.
Why not rename the app to something more generic like "OS X Diskmaker"? Just download the Lion Diskmaker app, unzip it, and run it.
How to create a bootable, backup Mountain Lion install disk | Ars Technica
You'll basically need to click four buttons: " The process will take about 30 minutes or so using USB 2. If you like doing things yourself, however, the process is still pretty straightforward for any user comfortable with right-clicking and drag-and-drop. Website - optional. Save my name, email, and website in this browser for the next time I comment.
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Restore Disk Image. Author: Damien. Damien has written post s on AppDucate. Todd Koss. Conor Patrick. Damien Zander.
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Reply April 23, at am. April 25, at pm. Thanks Reply May 29, at am. Reply May 29, at am. Reply June 15, at am. Zack Whitfield. Did you try this? Reply June 17, at am. All data on the USB flash drive will be deleted. Click the Apply button. Disk Utility asks you to confirm that you want to partition the USB device. Click the Partition button. Do not select the volume name; select the device name.
How to Install (or Reinstall) Mac OS X Mountain Lion
Click the Restore tab. Drag the InstallESD. It will be near the bottom of Disk Utility's device list. You may need to scroll down to find it. Drag the USB flash device's volume name from the device list to the Destination field. Some versions of Disk Utility may include a box labeled Erase Destination ; if yours does, make sure the box is checked.
Create Bootable Copies of the OS X Mountain Lion Installer
Click Restore. Disk Utility asks you to confirm that you want to perform a restore, which erases all information on the destination drive. Click Erase.
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