![]() The first one involves repairing the installation volume’s permissions using Disk Utility. FixesĪccording to CNET, there may be a few ways to reinstall OS X on your new Mac computer. The Mountain Lion installer available in the App Store is a later version and is older than the operating system currently installed into the computer, which is causing errors when your try to download and install Mountain Lion from the App Store. OS X installer programs have a list of compatible systems on which it can be installed. The problem seems to be a compatibility issue with the Mountain Lion installer available in the App Store. Congratulations, now you can import your files and other important data, that you have created a backup earlier or you can also just copy the backup files manually.It seems a bit odd that computers running OS X Mountain Lion wouldn’t be able to reinstall the OS since the computer is already running the operating system. ![]() Upon the reboot of your Mac device, you will be having a complete installation of OS X Mountain Lion 10.8. Step 8: Finally choose your newly formatted drive, in order to start your installation process. Step 7: Upon completion of formatting your drive, go out from Disk Utility and click over "Install Mac OS X" button from the available menu. Wait for few minutes to complete the formatting process. Step 6: Next step is to click the "Erase" button in order to format your drive. Now format the selected disk drive by clicking over "Format" menu and finally select "Mac OS Extended(journaled)". Step 5: Now on the next screen, choose the option "Disk Utility" and once you are inside, select your system hard drive where you wish to install OS X Mountain Lion 10.8. Step 4: While on the startup, from the boot menu, you will have to choose "Mac OS X installer". Step 3: Now connect the newly created boot installer to your system and reboot it while holding down the option key. Another option in front of you is to make a bootable drive using the Lion Disk Maker tool. The process for making bootable USB drive can be manually done without any difficult. Step 2: Once you had purchased the OS X Mountain Lion 10.8, you will then have to create a bootable drive for installing Mountain Lion 10.8 onto your Mac device. And downloading tutorial are being explained on the above steps. ![]() You can get the original copy of OS X 10.8 Mountain Lion from Mac App Store for just 19.9$. Step 1: The first and the most important thing for you is to have your own original copy of the new OS X 10.8 Mountain Lion. Step 4: Finally mount the "InstallESD.dmg" file onto your Mac Desktop by double clicking it. Step 3: Now you have to go to the directory, Contents> SharedSupport and find a file named as "InstallESD.dmg". Step 2: Now once the download is completed, go to applications> directory and select the "Show Package contents" option, which pops out while right clicking on "Install Mac OS X Mountain Lion.app". Step 1: Go to the App store and download the OS X Mountain Lion 10.8. Recheck the article twice before performing your installation process, in order to ensure complete successful installation without any interfere in between. While following the guide below, you will need to format and erase your Mac disk and all the data on it, in order to perform a clean install of the new OS X 10.8 Mountain Lion.īefore going further into the installation process, I would strictly recommend you to backup your Mac in order to save your important files, data and settings from being lost.įollowing few steps are the important steps in this guide for you to perform a clean install of the new OS X 10.8 Mountain Lion on to your Mac Device.
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