This means that as long as you have a good backup; a 5GB-or-larger thumb drive or external drive; and either an already-downloaded copy of the installer or access to a Mac running Snow Leopard, Lion, or Mountain Lion, you can perform a bit of installer razzle-dazzle. For this purpose, I recommend a clone.
Be sure to test this backup to verify that it has your latest data: In the case of a Time Machine backup, try restoring some important data from the backup; in the case of a clone backup, boot from the clone to make sure it boots and that it contains all your data. Create a bootable install drive using the instructions for creating a bootable Mountain Lion install drive.
Product Reviews. Contact Us. Log in Register. Search titles only. Search Advanced search…. New posts. Log in. For a better experience, please enable JavaScript in your browser before proceeding. Can I upgrade from OS X The upgrade install process lets you install Mountain Lion over your existing version of macOS and still retain all of your user data, most of your system preferences, and most of your applications.
You may lose some apps that cannot run on Mountain Lion. The installer may also change some of your preference files because certain settings are no longer supported or are incompatible with some features of the new OS. We recommend backing up your current system before starting the upgrade process. You can create a Time Machine backup, a clone of your startup drive, or just back up your most precious files.
If you have everything lined up with current backups in place, you can proceed to the upgrade process. This guide will take you through an upgrade install of macOS Mountain Lion. The upgrade will replace the version of macOS your Mac is currently running, but it will leave your user data and most of your preferences and apps in place.
Before you begin the upgrade, make sure you have a current backup of all your data. While the upgrade process shouldn't cause any problems, it's always best to be prepared for the worst. Launch the Mountain Lion installer. The download process may also create a Mountain Lion installer icon in the Dock for easy access. Close any applications that are currently running on your Mac, including your browser and this guide.
If you need to consult these instructions, you can print the guide or use a mobile device to read them. With the Mountain Lion installer window will open, select Continue. The license agreement will appear.
You can read the terms of use or select Agree to continue. A new dialog box will ask if you've read the terms of the agreement. Select Agree. By default, the Mountain Lion installer selects your current startup drive as the target for the installation.
If you want to install Mountain Lion on a different drive, select Show All Disks , select the target drive, then select Install. Mac computer with an Intel processor 2. DVD drive for installation 5. Some features require a compatible Internet service provider; fees may apply. Upgrading to Lion If your computer does not meet the requirements to install Mountain Lion, it may still meet the requirements to install Lion.
Lion System Requirements 1. OS X v Some features require an Apple ID; terms apply. MacBook Late Aluminum, or Early or newer 3. MacBook Air Late or newer 5. Mac mini Early or newer 6. Mac Pro Early or newer 7. Xserve Early Are my applications compatible? Am I eligible for the free upgrade? View answer in context. Helpful answers Drop Down menu. Dec 29, PM in response to ajeansres In response to ajeansres ajeansres wrote Loading page content.
Reply Helpful 1 Thread reply - more options Link to this Post. User profile for user: Allan Eckert Allan Eckert.
0コメント