Often, the best option to fix these problems would be to reformat your computer and reinstall your OS, but since most of us don't plan on ever taking this drastic measure, we don't obtain a recovery disc or thumb drive. In other cases, your Mac can be experiencing some major malfunctions: constant crashing, locked controls, slow boot times, missing files, etc. At one point, I realized that there were plenty of files on my Mac that I didn't need any more, but too many to delete individually. From there, you can upgrade to the latest version if you choose.As I've said before, slowing down is not an option for me. This will install the version of OS X that was first installed on that machine. Select Disk Utility and erase your HD, just as instructed to do in the first section of this article. From there, you’ll see an OS X Utilities window with the aforementioned options listed. Restart your Mac and hold down the Command + R keys until the Apple logo appears. It’s easy to get into OS X Recovery, too: With OS X Recovery, we have a built-in set of tools to install OS X, repair and erase your HD, check your internet connection, and restore from Time Machine backup. Thankfully, we no longer have to mess with DVD. These are available through Apple, PowerMax, and other sources. If you’re running 10.6 (Snow Leopard) or earlier, you will need an Install / Restore DVD as described above. Since Internet Recovery (described below), there is no need for discs, only an internet connection. **Install/Restore DVDs no longer come with new or used Macs. After you have finished installing, the computer will reboot, taking you back to the original “new Mac” screen. After you are done, close Disk Utility and continue with the installation from that disk. In there select your hard drive (HD) and use the Erase tab to wipe the drive clean. Then, from the Utilities menu, select Disk Utility. When you boot up of the DVD you will pick your language. Insert the disc and restart the computer holding down the key. Look through the box the mouse came in to find the discs. A set of Install / Restore DVDs is shipped with all modern new Macs**, and are most often grey in color. Answer:There is an easy way to get your Mac back to a “Factory Fresh” install of OS X.

Os x utilities menu