

The problem is that once you have run through the installer, it will be automatically deleted preventing you from using it again. You might think that you could simply copy the installer but this is not easily achieved. If you have more than one computer you would ordinary have to download the installer separately for each machine. Whether you have a single computer to upgrade, or want to bring your entire fleet of Macs up to date with Mountain Lion, it is quite possible that downloading a large installer could push you over your monthly limit, possibly resulting in hefty charges. But what the online installer model fails to take into account is that many people have to work within monthly download limits put in place by their ISP - this is something that Lion DiskMaker can help with. From Apple’s point of view this helps to dramatically reduce production costs, and these saving can then be passed to customers who reap the benefits of cheap upgrades. Like its predecessor, Apple’s most recent version of OS X, Mountain Lion, has been made available in the app store.
