![]() ![]() Run this command in Terminal: xattr -cr "wherever your installer is. If you get a damaged message when launching the installer app, no need to worry. If you encounter any issues while downloading or installing OS X Mountain Lion on your Mac, here are some troubleshooting tips that may help you: Troubleshooting Tips for Downloading and Installing OS X Mountain Lion For example, you can check out this link: You can find detailed instructions on how to do that on the Internet or YouTube. You can use various tools and methods to create a bootable USB or ISO from this disk image, such as Disk Utility, Terminal, or third-party apps. If you want to create a bootable USB or ISO from the OS X Mountain Lion Installer App, you can do so by using the InstallESD.dmg disk image that is found under Contents/SharedSupport/ in the app package. ![]() How to Create a Bootable USB or ISO from the OS X Mountain Lion Installer App Restart your Mac when prompted and enjoy your new OS X Mountain Lion. Wait for the installation to complete, which may take some time depending on your Internet speed and Mac performance. To install OS X Mountain Lion on your Mac, you need to follow these steps:ĭouble-click on the “Install OS X Mountain Lion” app in your /Applications/ folder to launch it.įollow the onscreen instructions to agree to the terms and conditions, select your destination disk, and start the installation process. How to Install OS X Mountain Lion on Your Mac ![]() Locate “OS X Mountain Lion” in the list, and click on the “Install” button to redownload.įind the “Install OS X Mountain Lion” app in your /Applications/ folder when finished downloading. Launch the Mac App Store and hold down the “Option” key while clicking on the “Purchases” tab. ![]() To download the OS X Mountain Lion Installer App, you need to follow these steps: How to Download the OS X Mountain Lion Installer App You do not have a Mac that shipped with Mac OS X Mavericks or later, as they are not compatible with this installer. You have one of the following Mac models: iMac (Mid 2007-2020), MacBook (Late 2008 Aluminum, or Early 2009 or newer), MacBook Pro (Mid/Late 2007 or newer), MacBook Air (Late 2008 or newer), Mac mini (Early 2009 or newer), Mac Pro (Early 2008 or newer), or Xserve (Early 2009). You have an Apple ID and a compatible Internet service provider. You have 2 GB of memory and 8 GB of available space on your Mac. You have OS X Snow Leopard 10.6.8, Lion 10.7, or Mountain Lion 10.8 already installed on your Mac. Requirements for Downloading and Installing OS X Mountain Lionīefore you can download and install OS X Mountain Lion on your Mac, you need to make sure that your Mac meets the following requirements: In this article, we will show you how to do that and what you need to prepare before you start. If you have an older Mac that is not compatible with the latest macOS versions, you can still download and install OS X Mountain Lion using the OS X Mountain Lion Installer App. It brought many new features and improvements to the Mac experience, such as iCloud integration, Notification Center, Messages, Reminders, Notes, Game Center, AirPlay Mirroring, and more. OS X Mountain Lion is one of the most popular versions of the Mac operating system, released in 2012. OS X Mountain Lion Installer App: Everything You Need to Know ![]()
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