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#Mac os x moutain lion dmg how to
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Confirm you would like to do this, and when complete you should have a fully bootable Mountain Lion installation drive.

Drag your destination drive (the desired USB or FireWire drive volume) to the Destination field, and then click the Restore button.

When you do this you should see the disk image appear in the Source field, but if not then drag it there.

Select the InstallESD.dmg file in Disk Utility and click the Restore tab that appears in the main Disk Utility window.

Optionally partition it by selecting it and using the Partition tab to split it into two logical volumes (one for the Mountain Lion installer and the other for extra storage space) by clicking the plus button to create a new partition, and then setting the first partition to be 4.8GB in size.ĭrag the destination drive to the Destination field, and drag the InstallESD.dmg image to the Source field.

Connect a spare USB or FireWire drive that has at least 6GB of capacity, which should show up in Disk Utility.

#Mac os x moutain lion dmg install

If you wish to create a USB or FireWire install drive instead, then continue on to step 6. In Disk Utility select the InstallESD.dmg file, and then you can click the Burn icon in Disk Utility's toolbar to burn the image to a DVD (single-layer 4.7GB discs do not have enough space, so use dual-layer 8.5GB discs).Open Disk Utility (in the Applications > Utilities folder) and drag the InstallESD.dmg image to the device sidebar, where it should appear under your various disk and volumes listings.In the new window that opens, go to the Contents > SharedSupport folder and locate the file called "InstallESD.dmg.".

#Mac os x moutain lion dmg mac os x

Right-click the "Install Mac OS X Mountain Lion" application in the Applications folder, and choose "Show package contents.".In this case, you can go to the Purchases section of the App Store and redownload the installer. If you have already installed Mountain Lion, the installer will have been automatically deleted from your system. Locate and right-click the Mountain Lion installer to show its contents (click for larger view). Quit the installer (press Command-Q) and go to the Application folder on your system. Purchase and download Lion from the Mac App Store (or use your up-to-date redemption code), and when the download is finished, the Mountain Lion installer will load.Therefore, to create a standalone USB or optical media install drive for OS X 10.8 Mountain Lion, do this: However, when following the procedure for Lion you might run into a snag that will prevent the drive from being created.

#Mac os x moutain lion dmg how to

We previously outlined how to create your own OS X install drive when OS X Lion was released, and the process for Mountain Lion is for the most part the same. Additionally, while Apple's OS should be available using Apple's various Internet recovery options, this can often take a long time to download, especially if you do not have the fastest broadband connections available to you.

As with OS X Lion, Apple will likely release USB drives containing a bootable Mountain Lion installer, but this will cost you more than the App Store download. You also might be interested in creating a standalone install drive for Mountain Lion. If you're interested in the new OS, then be sure to read our guide on preparing your Mac for installing the upgrade, which includes information on the OS requirements, backing up, and clearing up resolvable issues before performing the upgrade.

#Mac os x moutain lion dmg full

Apple has released its OS X 10.8 Mountain Lion (see CNET's full review) and it's available for download from the Mac App Store on systems running OS X 10.6.6 or later.