MY BROTHER's company has problems in virus,hacker break in,trojean,system unstable,hangs,crash freq and of course using windows xp.

therefore,he wants to try mac machine for sure,but it's too expensive for whole office equipments set.

Is there any unix/linux distro more MAC OSX like ??more GUI !User friendly interface ?I mean he doesn't know about compile source code,run rpm update ,configure settings and also doesn't have time to do so.

I have yet to see Linux deployed in a desktop environment where the users didn't self administer there boxes. However, the MIS department at the company I work for is in the process of deploying cheap Suse 9.2 machines with Crossover Office to employees that only need computers for the basic Web/Email/Office type tasks (I personally have had linux on my work machine ever since I started... but I self administer my boxes).

As for the Mac solution... I know they don't necessarily look "professional" but I have picked up one of those cheap Mac Minis with a 20" Apple Cinema Display and it is wonderful. With a reasonably priced monitor (which the Cinema Display is not...) you can get a full rig going for well under $1000.

there are various easy to use linux distros (Mandrake , suse , xandros , fedora...) and you could change it to look like a mac but you have to set up linux just one time , then you dont have to touch it again