You can't 'ban' someone unless you're a Mod, but if you go into a member's profile there's an option in there to add them to your Ignore List. Once they're on there, it'll blank out their posts.
You can't ban someone yourself, they have to break some of the rules here in order for the mods to warrant banning them completely but you can use the ignore feature in your User CP which makes their posts hidden.
Thank you, do not want to ban the individual from the forums ... I just did not want to read his/her negative Mac jibes... so your help is appreciated ... I got the job done.