i only have 1 mac lol i said doing a mac check for availability even though my mac is attached to my donation it shows as being available when using the checker, but when i go to add my mac in the attach the mac to a donation thats the section im told its already attached hense dara saying "doubts that the MAC checker is actually working" <- id have to agree. but donations i have 3 kids,my room "boys den" family room