![]() ![]() ![]() You will be warned that the whole content of data in the USB thumb drive will be erased. Confirm with the USB thumb disk selection in the next step.ĥ. As I use an 8 GB of SanDisk, I select the ‘An 8 GB USB thumb drive’ button. Select the kind of disk you will use for the boot disk. Make sure that the path is correct and then click ‘Create a boot disk’ button.Ĥ. After you click one of the version of OS X above, the application is smart enough to search and detect the available image in the HDD or SSD. This application is able to create a boot disk of Lion (10.7) and Mountain Lion (10.8)ģ. Unzip and run the application, and then select which OS X version you want to make a boot disk of. Format the USB flash disk with Mac OS Extended (Journaled) file system type using Disk UtilityĢ. Here are the step-by-step on how to easily create OS X Mountain Lion USB Boot Disk / Installerġ. For example, I use an 8 GB of SanDisk Cruzer Blade. Since the size of the OS X image is more than 4 GB, you need an 8 GB USB flash drive. You can create a USB stick installer for OS X Mountain Lion. If you wish to install / upgrade other Mac computers, you don’t need to re-download from the App Store. Skip the step by pressing Quit button.Ĭopy the ‘ Install OS X Mountain Lion’ installer app located in Applications folder to another folder elsewhere because the installer app in the Applications folder will be automatically deleted after upgrading. Once it is downloaded, do not continue with the installation step because it will delete the installer file. Download for free OS X Lion on Apple’s support page here or OS X Mountain Lion on Apple’s support page here.You can buy and download the OS X Mountain Lion from App Store to upgrade your older Mac OS X version.Pay for OS X Lion and Mountain Lion $19.99 through the Apple Store. ![]() So if by any chance you have an old Mac and want to install an old version, you can choose one of the two paths: The new M1 Macs, for example, can only be restored to macOS 11 Big Sur. For example, only Macs launched before 2012 are eligible to install them and the user must factory reset their computer to be able to run these older OS X systems. Why would I install an older Mac OS X software?Īs for now, a limited number of Macs can install these old operating systems.
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