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Chapter 1. Upgrading to Mac OS X > Upgrade or Trade Up?

Upgrade or Trade Up?

Whenever it’s time to upgrade to a new operating system, every user decides whether to upgrade what he has or to buy something new.

For non-Mac users, this has always been a concern because new operating systems are much more memory- and processor-intensive than their predecessors. Mac users typically do not have this problem, because all of the versions of Mac OS are geared to perform with all of the products that shipped after the release of a particular OS. Typically, this OS is 8.0, which began shipping in the fall of 1997. A product released with an earlier version of Mac OS might not be compatible with Mac OS X, even if it has been upgraded to OS 9.2.1, which is what OS X needs to run its Classic environment. Mac OS X requires any Mac with an Apple-installed G3 or faster processor and 128MB of RAM. That means the original Power Macintosh G3 (Fall 1997) and later systems can accommodate Mac OS X, but nothing earlier.


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