How to install Mac OS X Yosemite. Use Time Machine or another backup method to back up all your data. Consider a clean installation on a separate volume. (this is termed a clean install. Apr 30, 2018 When a menu comes up, double click on the disk (probably Macintosh HD) that you installed OS X on. Apple has designed OS X/macOS so that one can just upgrade to the next version, 'over the top,' seamlessly. With this kind of upgrade, all user data, settings and accounts remain as before, and that works for most users most times. However, there are occasions when a user needs to do what's called a 'Clean Install.' This is like setting up a Mac as if it first came out of the box and then personal data is restored. This article, after a brief introduction, will list the steps needed for that Clean Install. There are some users who suspect that a Clean Install is a good way to approach a complete new version of OS X or macOS. Over time, a lot of cruft, that is, unused extensions, app support files, preferences and other files in your Library folder or System Library folder can become troublesome or even a security issue, like Java. How to get a ps2 emulator on mac. ![]() Or just take up too much space. See, for example: ' In addition, sometimes the normal housecleaning process with apps like Spring Cleaning and App Zapper can't solve a particularly difficult issue, and the only way to get a fresh start is a Clean Install. But First, Let Me Talk You Out of Doing This A Clean Install, as you'll see below, can be a time intensive process. On the other hand, over the years, we've learned that OS X is pretty good about ignoring things that are no longer applicable. For example, in OS X Yosemite, unless a kernel extension is digitally signed by Apple it won't load. Adam Christianson () has written 'If you aren’t really having any issues or problems then just download the new OS, install over the top and go on your merry way.' We both agree that an over the top is generally the best idea. Those who still pursue the thought of a Clean Install usually reconsider when they realize that everything they own will be deleted from the Mac. • The boot drive is erased. • All user accounts are deleted. • All the files in all the user accounts (spouse, children, family cat) will be deleted. Every document, movie, song and photo will be deleted. • All network settings are deleted. • Every application and its license files will be gone. ![]() Forging Ahead However, there is a way to do a Clean Install and restore all your data if you really want to. That's what this article is all about. In summary, you will: • Make thorough backups of your entire boot drive in several ways. • Erase your boot drive.
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