If you're using a Mac notebook computer, plug it into AC power. For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of macOS. Double-click the downloaded file to open a window showing its contents.
After installation of the installer is complete, open the Applications folder on your Mac, then double-click the file named Install OS X Yosemite. 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.
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 OS X and related updates to your Mac firmware. How to update your Mac You should back up your Mac before installation. You can back up with Time Machine , for example. Use the Mac App Store to install this update and other available updates.
Mac OS X Lion version And more. And with iCloud, now your Mac works even better with your iOS devices. OS X Mavericks version OSX Mavericks is an impressive operating system which has come up with lots of new features and updates.
With OSX Mavericks you can now take the whole world on your desktop. You can easily look up for different directions and then finally send them to iPhone for recognition of your voice.
If you have a newer Mac, there is no physical option to install Mac OS versions older than your current Mac model. But as it often happens, workarounds are possible. There is still a chance to download the installation file if you have an access to a Mac or virtual machine running that operating system.
For example, to get an installer for Lion, you may ask a friend who has Lion-operated Mac or, once again, set up a virtual machine running Lion. Then you will need to prepare an external drive to download the installation file using OS X Utilities. Below is the detailed instruction how to do it. Now the OS should start downloading automatically onto the external drive. After the download is complete, your Mac will prompt you to do a restart, but at this point, you should completely shut it down.
Locate InstallESD. The same steps are valid for Mountain Lion and Mavericks. If your Mac runs macOS Sierra Instruction to downgrade from macOS Sierra. Jul 18, PM. Page content loaded. Communities Get Support. Sign in Sign in Sign in corporate. Browse Search.
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