Further down we’ll explain where to get one and what problems you may face down the road. Finally, if you want to run a parallel copy of Mac OS X on a virtual machine, you too will need a working installation file of an older Mac OS X. Also, you may have noticed your Mac’s performance went down right after the last update. To begin with, some of your apps may not be working properly (or simply crash) on newer operating systems. There are many reasons that could point you to this radical decision. So, you’ve decided to download an older version of Mac OS X. Global Nav Open Menu Global Nav Close Menu Apple Shopping Bag +.OS X can search the Mac App Store to find the app that can open the file. You can browse Mac apps by category, such as games, productivity, music and more. The Mac App Store makes it easy to find and download Mac apps as well as widgets and extensions - like editing extensions for the new Photos app.

OS X Mountain Lion brings a lot of great things from iPhone, iPad, and iPod touch to the Mac. First you download the installation package, and then you install Acrobat Reader DC from that package file. Installing Adobe Acrobat Reader DC is a two-step process.