BOOTABLE USB MAC OS X MOUNTAIN LION HOW TO
BOOTABLE USB MAC OS X MOUNTAIN LION FOR MAC OS X
BOOTABLE USB MAC OS X MOUNTAIN LION MAC OSX
BOOTABLE USB MAC OS X MOUNTAIN LION INSTALL
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Navigate to Contents > Shared Support, and you should see a disk image called 'InstallESD.dmg.' We will restore this disk image to our flash drive (or other disk) using Disk Utlity. Start by right-clicking (or control-clicking) on the 'Install OS X Mountain Lion' app, which should be in your main 'Applications' folder after downloading. If you like doing things yourself, however, the process is still pretty straightforward for any user comfortable with right-clicking and drag-and-drop. The process will take about 30 minutes or so using USB 2.0 (it should be faster if you have a USB 3.0-compatible flash drive and newer Mac). You'll basically need to click four buttons: '10.8 Mountain Lion,' 'Use this copy,' 'Create a boot disk,' and, if you're using a USB flash drive as recommended, 'An 8 GB USB thumb drive.' It's really that simple Lion Diskmaker takes care of the rest.

BOOTABLE USB MAC OS X MOUNTAIN LION DOWNLOAD

Just download the Lion Diskmaker app, unzip it, and run it. (Why not rename the app to something more generic like 'OS X Diskmaker'? Gète says he just likes the existing name better, and besides, it's less likely to catch the ire of Apple's lawyers.)

BOOTABLE USB MAC OS X MOUNTAIN LION INSTALL

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. If you find digging in to bundles and using Disk Utility to be tedious or bothersome, you can thank developer Guillaume Gète for making Lion Diskmaker. 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.

Other external drives will also work, but make sure the type works with all your Macs-USB is the most universal. We recommend a USB flash drive for your backup installer they're cheap and easy to store and transport. Mountain Lion installer app downloaded from the Mac App Store.An 8GB or larger USB flash drive, other external disk, or 4.7GB DVD-R.Therefore, you need to either make a copy of the installer outside of the Applications folder or make your install disk before upgrading. Important warning: the OS X installer will delete the necessary file needed to make your own install disk once it runs. We have instructions for those of us who just want to get it done-using the donation-ware Lion Diskmaker app-as well as those that don't mind a little extra clicking to do it yourself. Do you really need to wait 45 minutes or more for each one? Absolutely not! Just make your own bootable install disk using our handy tutorial. When the burn process is complete, eject the DVD, add a label, and store the DVD in a safe location. Place a blank DVD into the Macs optical drive, then select Burn to create a bootable DVD containing OS X Mountain Lion.

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Hit the Apply button to begin the process.įinally, to boot from your install DVD/USB key and install OS X Mountain Lion, restart your Mac and hold the Option key down when you hear the startup chime.Happy Mountain Lion Day! Now that you have downloaded the 4.34GB installer, you may want to install Mountain Lion on more than one of your personal machines. Find many great new & used options and get the best deals for Mac OS X Mountain Lion 10.8 USB for Install Reinstall Upgrade or Recovery at the best online. Select the InstallESD.dmg file you copied to the Desktop.

BOOTABLE USB MAC OS X MOUNTAIN LION MAC OSX

Now click the Restore tab and choose the DMG file as your source and the USB drive as the destination. There are many ways to Create Bootable USB mac osx installer, but I am going to explain only useful information here.This will make the drive bootable and formatted correctly for the Mac. Click the Options button and choose “ GUID Partition Table“.Select the Partition tab, select “ 1 Partition” from the dropdown menu and choose “ Mac OS Extended (Journaled)” for the format type. Insert the USB disk and select it in the sidebar in Disk Utility.

If you’re creating a USB drive, you’ll need to first format the drive properly: If you’re burning to DVD: insert your disk, select the DMG file in the sidebar, and hit “ Burn“. Now open up Disk Utility from your Applications > Utilities folder and drag the DMG file into the sidebar on the left.

BOOTABLE USB MAC OS X MOUNTAIN LION HOW TO

While Apple has decided not to sell the update on optical media or USB sticks, you can always keep a physical copy of your Mac App Store download in the form of a bootable OS X Mountain Lion install DVD or a USB key. This is more useful if you ever want to do a clean install of the operating system.īelow are the step-by-step instructions on how to create a bootable OS X Mountain Lion install DVD or a USB drive:ĭownload OS X Mountain Lion from the Mac App Store, but don’t install it yet.įind the installer in your Applications folder and right-click on it then select “ Show Package Contents.” Browse to Contents > SharedSupport and look for the file called “ InstallESD.dmg” Apple released OS X Mountain Lion yesterday exclusively as a digital download via Mac App Store for $19.99, or free if you own a qualifying new Mac computer.

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