- Download Mac Os X Mountain Lion For Macbook Pro Max
- Download Mac Os X Mountain Lion For Macbook Pro 13.3
Here’s how to install (or reinstall) OS X, step by step: Boot from your Recovery HD partition by restarting your Mac while holding down the cmd+R keys. The OS X Utilities window appears. Select Reinstall OS X, and click Continue. The OS X Mountain Lion splash screen appears. A sheet appears informing you that your computer’s. How To Re-Download Mac OS Lion. So, assuming that you already downloaded and installed Lion, when you go to the App Store, and look at your Purchases section, Lion will show as “Installed” (see the picture above). Here are the steps to re-download Lion. Launch the App Store; While holding down the OPTION key, click on the “Purchases.
macOS Big Sur elevates the most advanced desktop operating system in the world to a new level of power and beauty. Experience Mac to the fullest with a refined new design. Enjoy the biggest Safari update ever. Discover new features for Maps and Messages. And get even more transparency around your privacy.
Check compatibility
macOS Big Sur is compatible with these computers:
MacBook introduced in 2015 or later
MacBook Air introduced in 2013 or later
MacBook Pro introduced in late 2013 or later
Mac mini introduced in 2014 or later
iMac introduced in 2014 or later
iMac Pro
Mac Pro introduced in 2013 or later
View the complete list of compatible computers.
If upgrading from macOS Sierra or later, macOS Big Sur requires 35.5GB of available storage to upgrade. If upgrading from an earlier release, macOS Big Sur requires up to 44.5GB of available storage. To upgrade from OS X Mountain Lion, first upgrade to OS X El Capitan, then upgrade to macOS Big Sur.
Make a backup
Before installing any upgrade, 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.
Get connected

It takes time to download and install macOS, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
Download macOS Big Sur
If you're using macOS Mojave or later, get macOS Big Sur via Software Update: Choose Apple menu > System Preferences, then click Software Update.
Or use this link to open the macOS Big Sur page on the App Store: Get macOS Big Sur. Then click the Get button or iCloud download icon.
Begin installation


After downloading, the installer opens automatically.
Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.
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.
Allow installation to complete
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.
Stay up to date

After installing macOS Big Sur, you will be notified when updates to macOS Big Sur are available. You can also use Software Update to check for updates: Choose Apple menu > System Preferences, then click Software Update.

Or get macOS Big Sur automatically
If you're using OS X El Capitan v10.11.5 or later and your App Store preferences or Software Update preferences are set to download new updates when available, macOS Big Sur will download conveniently in the background, making it even easier to upgrade. A notification will inform you when macOS Big Sur is ready to be installed. Click Install to get started, or dismiss the notification to install later. When you're ready to install, just open the file named Install macOS Big Sur from your Applications folder.
Learn more
- If the installer shows a list of apps that are not optimized for your Mac, learn about 32-bit app compatibility, then choose whether to proceed with the installation.
- For the strongest security and latest features, upgrade to macOS Big Sur. If you have hardware or software that isn't compatible with Big Sur, you might be able to install an earlier macOS.
- You can also 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.
Download Mac OS X Mountain Lion 10.8.5 latest version standalone offline DMG image for your Apple computer. Mac OS X Mountain Lion 10.8.5 is a very powerful and reliable operating system for your Macintosh computer with different enhancements and improvements.
Mac OS X Mountain Lion 10.8.5 Review
Download Mac Os X Mountain Lion For Macbook Pro Max
Apple has now released the Mac OS X 10.8.5 Mountain Lion release after a long beta period. This version tends to be more secure and even more efficient than the previous versions of Mac OS. Comes up with a sleeker and very friendly user interface to handle all the problems with a comfortable environment. You will find every feature you need in this release. There are numerous fixes and improvements in this release so to make it a stable operating system. Wifi performance is also greatly enhanced for 802.11ac for AFP file transfer.
Screen Saver fixes are also made as well as Mail issues have also been addressed in this release. Moreover, Xsan reliability, transfer of huge files over the ethernet, Open Directory Server authentication, and many other improvements are also there so the system can deliver better performance within the network. Security vulnerabilities are also fixed which were discovered in Apache, Certificate Trust Policy, Bind, ClamAV, ImageIO, CoreGraphics, Installer, Kernel, IPSec, Mobile Device Management, PHP, PostgreSQL, OpenSSL, Power Management, Screen Lock, QuickTime, and sudo. On concluding notes, Mac OS X Mountain Lion 10.8.5 is the stable and best operating system.
Features of Mac OS X Mountain Lion 10.8.5
- Stable operating system for your Apple device
- Various security enhancements and issues fixes
- Better performance of MacBook Air
- fixes for Smart Card and screen saver issues
- AFP file transfer performance over 802.11
- Sending huge data over the ethernet
Technical Details of Mac OS X Mountain Lion 10.8.5
- File Name: Mac_OS_X_Mountain_Lion_10.8.5.dmg
- File Size: 4.2 GB
- Developer: Apple
System Requirements for Mac OS X Mountain Lion 10.8.5
- 2 GB of RAM
- 8 GB free HDD
- Multi-Core Intel Processor
Mac OS X Mountain Lion 10.8.5 Free Download
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Download Mac OS X Mountain Lion 10.8.5 latest version DMG image. It is a stable Mac OS X Mountain Lion release and a reliable operating system. You can also download Mac OS X Mavericks 10.9.5
