Upgrading The Operating System

Updates Available

There are usually two and sometimes three updates released for a version of the OS. Software Update and Appstore will choose the smallest size download available to get you to this latest version. However, the small update files will only upgrade one increment i.e. from say 10.9.2 to 10.9.3 but the much larger Combo Update will update you from any 10.9 to the latest.

So, why not just use Software Update? You can! Thousands of people do and have no problems whatsoever but, as the Combo Update will have all the files needed to update any version of the operating system to the latest, it may well repair any files that are damaged. So, if your Mac is not behaving itself, applying a Combo Update may help.