Many users, however, will have to add more memory …
Many users, however, will have to add more memory if they want to run Mac OS X: It requires a minimum of 128 MB of RAM, which is more than Apple included in most of its consumer models until recently. The operating system runs even better with twice as much memory. (Fortunately, RAM is at record low prices, with many vendors now offering 256-MB modules for $50 or less.)
Ah, the good ole days…