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This takes a long time to do and sucks up your internet bandwidth in the process, as each download could take two hours or more. Continue with the free upgrade by clicking the relevant OS X option. If you want to use the macOS installer multiple times, and you don't save it first, you need to download it again on each Mac you update. Visit the Mac App Store Free Download of OS X Yosemite for Mac. Within OS X Utilities, choose Reinstall OS X. It will also launch the Yosemite installer app when the download completes. This will put a file called Install OS X Yosemite Beta.app in your /Applications folder. If you’re registered for the Yosemite beta program, download the OS X Yosemite Public Beta installer from the Mac App Store. Prepare a clean external drive (at least 10 GB of storage). Step 1: Obtain the Yosemite Public Beta Installer. Click the appropriate button to download it and then enter your Apple ID and password when prompted.
#HOW TO INSTALL OS X YOSEMITE ON MAC MAC OS X#
The following method allows you to download Mac OS X Lion, Mountain Lion, and Mavericks. In either case, you’re taken to the OS X Yosemite page where you can download Yosemite for free. That means it can be huge, sometimes as big as 8GB or more. Install older OS X onto an external drive. Unlike most minor updates, the macOS installer includes an entire operating system for your Mac. You might have unexpected results if third-party OS X modifications have been installed, or you modified OS X through other means. Dont interrupt the installation process after it has begun.
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Some updates become available only after installing another update. This happens unless you save the installer before running the update. Use the Mac App Store to install this update and other available updates. Since most people only need to use it once, the macOS installer automatically deletes itself after you use it.
#HOW TO INSTALL OS X YOSEMITE ON MAC HOW TO#
Worry not we'll show you how to make better use of the macOS installer. After the drive is connected, open Disk Utility. But Apple doesn't save the macOS installer in an obvious location, so it's difficult to use the same file again. Connect the SSD to your Mac system (either externally using a SATA-to-USB adapter or internally in the system). If you have a few Mac computers in your household or office, you probably don't want to spend hours downloading the large macOS installation file multiple times. These updates are totally free and you can even sign up to the public beta to access them early. Every year Apple releases a major update to macOS, introducing new features and improvements for your Mac.