Features Of Mac OS X Mountain Lion 10.8.5. You can also check out the Mac OS X Snow Leopard DMG.
The updated Apple OS X Mountain Lion is recommended for all 13″MacBook Pro with a retina display, 21.5 'iMac (late 2012) and Mac mini (late 2012) systems.
Alternatively, you can search for it with Spotlight by clicking the magnifying glass icon in the top-right corner of the screen.There are many improvements and fixes in Mac OS X 10.5 Leopard Onstall DVD – Full ISO Image (update) including to Address Book, AirPort, Client management, iChat, Graphics, Mail, MobileMe, Networking, Printing, Parental Controls, Time Machine, Safari and other generaL fixes and improvements. If you would prefer to run it later, you can get to it by opening Launchpad and clicking the Utilities folder. If you are using a brand new Mac, the Migration Assistant will appear when you first turn on the computer. Migration Assistant can also transfer files from a PC to your new Mac. It lets you choose which folders and accounts you want to copy, and it can then transfer the files using an external hard drive, an existing home network, a FireWire cable, or an Ethernet cable. Yosemite makes it easy to transfer all of your files to your new Mac using the built-in Migration Assistant.
You may already have an Apple ID, especially if you've purchased music from the iTunes Store or owned a Mac before. The Apple ID is used to sign on for many different Apple services, including the Mac App Store, iTunes Store, and the Apple Online Store. In order to download Yosemite, you'll need an Apple ID. For more information, contact an Apple retailer or call (800) MY-APPLE (in the United States). If you have an earlier version, you may be able to buy and install Snow Leopard, which will then allow you to download Yosemite you'll first need to make sure your hardware will support Yosemite. OS X Yosemite is free to download and install if you have already have Snow Leopard, Lion, Mountain Lion, or Mavericks.
If you need to run PC and Mac software at the same time, you will need to buy additional software such as Parallels or VMware. The main disadvantage of Boot Camp is that you have to restart your computer whenever you want to switch between OS X and Windows. You can then install any PC software you need.
Boot Camp comes pre-installed in OS X, and it allows you to install Windows on your Mac (if you have the Windows installation discs). If you absolutely need to use PC software and there isn't a Mac version, you can use a feature called Boot Camp. Click the Apple icon in the top-left corner of the screen, then select About This Mac.On a Mac, all of your system information is visible from the About This Mac window. Then you can compare it with the requirements above to decide whether you'll be able to upgrade.
To upgrade to Yosemite, you'll need to know what type of hardware your Mac has, as well as which version of OS X you are using.