June 25, 2026
How to Install OS X Mountain Lion From the Mac App Store [Video]

How to Install OS X Mountain Lion From the Mac App Store [Video]

Posted July 25, 2012 at 10:45pm by
These are instructions on how to install OS X Mountain Lion 10.8 from the Mac App Store.



Step One
Launch the Mac App Store from your dock.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Two
Click to select OS X Mountain Lion from the list of applications on the right.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Three
Click the $19.99 button under the Mountain Lion icon then click the green Buy App button that appears.
How to Install OS X Mountain Lion From the Mac App Store [Video] How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Four
You will be asked to log into your iTunes account. Enter your login information and click the Sign In button.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Five
Launchpad will open and your OS X Mountain Lion download will begin. Press Escape to close Launchpad.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Six
You can view the progress of your download by switching to the Purchases tab.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Seven
Once the download has completed the OS X Mountain Lion install wizard will open. Click the Continue button to begin.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Eight
Click Agree to accept the software license agreement.
How to Install OS X Mountain Lion From the Mac App Store [Video]

How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Nine
Make sure the correct hard drive is selected for installation and click the Install button.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Ten
You will be asked to enter your administrative name and password. Enter these and click the OK button.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Eleven
OS X Mountain Lion will prepare the installation. Your computer will restart automatically.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Twelve
Once your computer restarts the installation will begin. This process can take from 15 minutes to an hour.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Thirteen
When the installation has completed successfully your computer will again reboot.
How to Install OS X Mountain Lion From the Mac App Store [Video]

Step Fourteen
Once the system has finished restarting you are ready to begin using OS X Mountain Lion.
How to Install OS X Mountain Lion From the Mac App Store [Video]
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Comments (2)
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Steve
Steve - July 26, 2012 at 6:35am
I am with Mountain Lion Developer Preview 4 (12A256), can I update the OS with the Final release from AppStore or I need to make clean install? Thanks!
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joyz
joyz - July 27, 2012 at 4:49pm
Always make clean install. So much better
Reply · Like
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