Mac Os X Mountain Lion Disk Image Download

  

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To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Apple recommends that you always use the latest macOS that is compatible with your Mac.

Click the install or download button for macOS / OS X which will download the macOS / OS X Install installer package to your hard disk (it may take a while as it is 4.3GB+ in size). At the point where the macOS / OS X installer has downloaded it will automatically launch and ask you to continue. Download a copy of OS X Mountain Lion, which you must purchase at the online Apple Store and download it from the Mac App Store. It is stored in the Applications folder on a Mac. The file is called Install OS X Mountain Lion. Obtain the macOS / OS X Disc Image (see instructions above). Go to Macintosh HD Applications Utilities Disk Utility. Click on the 'Burn' button at the top of the Disk Utility window. Navigate to the macOS / OS X disc image ('InstallESD.dmg' file). It’s called Install Mac OS X Lion.app and it should have been downloaded to /Applications. Right-click (or Control+click) the installer, and choose Show Package Contents from the resulting. RT'-MAC OS X Mountain Lion-MacmacMac OS-8miu-. B Color Image Link Quote Code Smilies. Mountain Lion:VirtualBox Arch Linux ISO image w/o burning CD/DVD Part 2. Install VirtualBox and Boot Arch Linux from the iso image: 1) Download VirtualBox disk image. OS X Mountain Lion is available now as a download from the Mac App Store.

Learn how to upgrade to macOS Big Sur, the latest version of macOS.

Check compatibility

If a macOS installer can't be used on your Mac, the installer will let you know. For example, it might say that your Mac doesn't have enough free storage space for the installation, or that the installer is too old to be opened on this version of macOS.

If you want to check compatibility before downloading the installer, learn about the minimum requirements for macOS Catalina, Mojave, High Sierra, Sierra, El Capitan, or Yosemite. You can also check compatible operating systems on the product-ID page for MacBook Pro, MacBook Air, MacBook, iMac, Mac mini, or Mac Pro.

Make a backup

Before installing, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.

Download macOS

It takes time to download and install macOS, so make sure that you're plugged into AC power and have a reliable internet connection.

These installers from the App Store open automatically after you download them:

Disk
  • macOS Catalina 10.15 can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks
  • macOS Mojave 10.14 can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion
  • macOS High Sierra 10.13 can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion

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Your web browser downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install [Version Name]. Open that app from your Applications folder to begin installing the operating system.

  • macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion
  • OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard
  • OS X Yosemite 10.10can upgrade Mavericks, Mountain Lion, Lion, or Snow Leopard

Install macOS

Follow the onscreen instructions in the installer. It might be easiest to begin installation in the evening so that it can complete overnight, if needed.

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Mac Os X Mountain Lion Disk Image Download Windows 10

If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.

Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both macOS and related updates to your Mac firmware.

Learn more

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You might also be able to use macOS Recovery to reinstall the macOS you're using now, upgrade to the latest compatible macOS, or install the macOS that came with your Mac.