Ok, let me spell this out for you peaches. You wrote:
the domain name is none relation with Apple or Mac.
Yet if you type in
www.itransmogrify.com your top links are ipod related (owned by mac). So your revenue is probably derived from handing Mac their traffic back to them. It may not be a TM right now but there's still a risk in taking on the name, hence 2 years worth of revenue being top dollar. Welcome to the world of domaining. PM me if you want to learn more.