How to Install Mountain Lion on an Unsupported Mac

With the release of OS X Mountain Lion (and now Mavericks), Apple dropped support for a number of Macs that are fully capable of running the OS. Thankfully, kernel patches and the like have been created so that Mountain Lion can be installed on these Macs.
Compatible Macs:
-Mac released from 2006 to 2008 with Core 2 Duo CPU and Lion installed – PPC, Core Duo, and Core Solo chips are not supported
-MacBook late 2006, 2007, and 2008
-MacBook Air, mid 2007
-MacBook Pro late 2007 and mid 2007
-iMac 2006
-Mac Mini 2006
-Mac Pro 2006, 2007
-Xserve 2006, and early 2008
For this, you will need to get the Mac OS X Mountain Lion Installer App, and MLPostFactor, which you can download from here. Keep in mind that the OS X installer can be no newer than 10.8.4, as MLPostFactor only supports up to 10.8.4 (Which means the installer has to be 10.8.0, 10.8.1, 10.8.2, 10.8.3 or 10.8.4). Also keep in mind that you cannot update to newer versions of OS X Mountain Lion without going through MLPostFactor.
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Install Mountain Lion On Unsupported Macbook Pro

Mac

Download Mountain Lion Installer

Many older Macs lost out on the ability to run OS X Mountain Lion (10.8.3!), but some hard working fellows have created a free third party tool called MLPostFactor that allows for the newest version of OS X to be installed on older, officially unsupported Macs. The process used to be quite complicated, but with MLPostFactor it’s easier than. Install OS X Mountain Lion. STEP 1: Purchase OS X Mountain Lion. The operating system is not free. Purchase and download the Application from the Mac App Store using an Apple ID on any Mac or functional computer running OS X 10.6.6 or later. STEP 2: Create a Bootable USB Drive Using UniBeast. Developed by Kelian Dumarais (MLforAll) Verison 2.0.1. MacOS Extractor is a legacy Application that assists you in install OS X 10.8-10.11 on your Unsupported Mac. By using this patching software on your Unsupported Mac, you can enjoy the various features and added security that modern Macs have. How to Install Mountain Lion on an Unsupported Mac With the release of OS X Mountain Lion (and now Mavericks), Apple dropped support for a number of Macs that are fully capable of running the OS. Thankfully, kernel patches and the like have been created so that Mountain Lion can be installed on these Macs. A Hackintosh-compatible computer with an empty hard drive: This is the computer where you will install OS X Mountain Lion. It can be the same computer as the one mentioned in the previous point. If your computer already has Mac OS X Lion installed, Niresh will just update Lion to Mountain Lion normally, without deleting any of your apps or files.