Patman, a computer running Mac OS 10 needs to do some maintenance on a daily, weekly, and monthly basis. Remember that underneath Mac OS 10 is basically a Unix (or BSD) operating system. Unix computers are usually running 24 hours a day. But most people that own Macintosh Computers shut them off at night. If you download a free program called MacJanitor, you can perform these maintenance tasks yourself at the end of the day before you shut your computer off.
You can also perform the maintenance tasks by going into the Terminal and typing the proper stuff in at the prompt, but unless you know a lot about Unix I would not recommend this.
You can also perform the maintenance tasks by going into the Terminal and typing the proper stuff in at the prompt, but unless you know a lot about Unix I would not recommend this.