You have discovered the main and primary difference of the Apple and IBM philosophical computer usage. Apple provides a whole "turn key PC" that basically does everything under the Apple label. While all other IBM based PCs are wide open. IBM did this to penetrate the PC field when they 1st came out. They never thought it would be so successful. Once done it couldn't be undone. Which is why IBM based PCs tend to garner roughly 80-90% of PCs out there. For what is a plus for one is a minus for the other side, sorta speak. Apple offered their PCs to the educational world for free or less cost. IBM types followed suit, and do just as well. But, Apple being 1st did well and many continued to use Apple. As time when on though, when it comes to the business world, IBM types rule. Apple still has a place but overall it seems to be for true believers, which you may find once you review the users.
personally i fell that apple desktops dont provide much liberty rather you have to stick to the given stuff on the other hand other brands provides you to use and experience with lots of stuff.