Next, let's open up a Terminal window and extract the package to a folder on our desktop. ![]() ![]() ![]() To start, grab the InstallMacOSX/InstallOS.dmg and mount it: This reveals the contents of the installer itself and. This means we'll need to manually extract the installer. Apple OS X 10.7 (Lion), 10.8 (Mountain Lion) Right-click the installer and select Show Package Contents from the context menu ( Figure C ). Your SMBIOS is too new to run that version natively (even if you're trying to make a USB for a different computer, it still checks). pkg inside.Äepending on what OS you're on, you can install this package, which will provide you with a "Install (macOS version).app" and head to Setting up the installer however if you receive this error: Mac OS X 10.7 Lion is available for older systems that are not compatible with the latest version of macOS and requires the following: Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor. How to get old versions of macOS (opens new window) (for 10.10 - 10.12 installers)Äownload your desired version and a.To do a clean install use the menu bar at the top to stop the process, then launch disk utility (. Mac OS X Mountain Lion Installer (opens new window) By default it assumes an upgrade and starts it automatically.Mac OS X Lion Installer (opens new window). ![]() To start, go to one of the following links: See Legacy macOS: Online Method for this version. Mavericks (10.9) is not available with this method.
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