For the first time, you'll be able to upgrade your mac to the most recent release of OS X for free of charge. simply click the mac App Store icon on your mac. download OS X Mavericks. And your mackintosh will do the remaining. Follow these steps to start your upgrade.
Step 1: Check your MAC hardware
To get details regarding your macintosh model, click the Apple icon at the top left of your screen, opt for about This macintosh, then opt for more information. Click the link below to see if your macintosh is compatible with OS X Mavericks.
Step 2: Check your version of OS X
While you've got the about This mac window open, check what version of OS X your macintosh is running. You’ll see it listed below your serial number.
You can upgrade to OS X Mavericks from ounce (10.6.8), Lion (10.7), or mountain lion (10.8). Click the link below if you've got an older version of OS X.
Step 3: Download OS X Mavericks
Open the mac App Store and click on OS X Mavericks. Click the download button. Then follow the onscreen directions to install it. If you don’t have broadband access, you'll be able to visit any Apple retail store to urge help with downloading.
