Pen drive bootable mac os x mountain lion

OS X Mountain Lion may not be distributed on bootable media, but that doesn't For most Mac users, having the OS X installer on portable media (DVD or a bootable OS X Mountain Lion installer DVD or USB flash drive.
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I firmly believe that technology is for everyone, no matter how daunting it seems to be, and here I will be writing about the hardware and software that should matter to I write about hardware and software YOU need to know about. Here's how. Once downloaded, fire up the app and point it at the USB drive.

How to Create a Bootable Mountain Lion 10.8 USB Install Thumb Drive

Note that everything on the USB flash drive will be wiped. So if you plan to use that installer on other Macs, or—in this case—to create a bootable drive, be sure to copy the installer to another drive, or at least move it out of the Applications folder, before you install. If you don't, you'll have to re-download the installer from the Mac App Store before you can create a bootable install drive. Before you make a bootable install drive, you should make sure you have the latest version of the Mountain Lion installer.


  1. How To Make An OS X 'Mountain Lion' Bootable USB Drive!
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It turns out that when you download the Mountain Lion installer from the Mac App Store, that copy of the installer installs whatever version of OS X was available at the time of download. For example, if you downloaded OS X Which means that a bootable install drive you create from that installer will install OS X For example, when the inevitable Obviously, then, you want to create your bootable install drive using the latest version of the Mountain Lion installer. However, unlike with other Mac App Store-purchased software, the Mac App Store does not update the copy of the Mountain Lion installer app on your hard drive.

Similarly, any bootable Mountain Lion install drive you create will not automatically be updated to the latest installer version. If you create an install drive and later download an updated version of the Mountain Lion installer, updating your install drive means erasing it and repeating the procedure below. How do you know if you have the newest version of the Mountain Lion installer?

How To: Create A Bootable OS X Mountain Lion Install DVD Or USB Key [Guide]

The easiest approach is to simply look at the Information box on the Mountain Lion page on the Mac App Store—specifically, check the date next to Updated. If the Mac App Store date is newer than the Modified date on your copy of the installer, you need to re-download the installer to get the latest version. If you create a new bootable installer using the first major update to Mountain Lion after your Mac was released, it should be able to boot all your Macs.


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For Lion, I explained how to create a bootable install drive for newer Macs. Follow Steps 1 through 4 in this slideshow to properly format the drive.

Get the latest version of the Mountain Lion installer

Here are the steps for using it to create your installer drive:. The restore procedure will take roughly five to ten minutes, depending on your Mac and the speed of your drive s. If you ever created a bootable Lion-install drive, you may have performed the above procedure without mounting the InstallESD disk image.


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  4. Make a Bootable USB Drive OS X Mountain Lion Recovery Partition;
  5. How To Make An OS X 'Mountain Lion' Bootable USB Drive!

As of version You can use Disk Utility's Restore screen to create a bootable flash drive or hard drive. Lion Disk Maker is a donationware app from Serial Server. Note that the program will overwrite all files on your USB drive or SD card when creating the bootable disk.

How to Make a Bootable OS X Mountain Lion USB Install Drive

Lion Disk Maker finds your copy of Lion downloaded to your Applications folder, asks you what media type you want to use to create the install disk, then handles the rest. The steps for burning Mountain Lion to disk are essentially the same as the ones for Lion :. Note that when you install Mountain Lion, you'll have a recovery partition on your drive in case something goes wrong.