i have logo 4 on windows 7 but thinking of buying a mac , do i have to buy logos 4 again for the mac , if i was to use fusion would using logos be slower on the mac , can i use windows 7 through fusion and quickly use logo while on the mac asin the same time as been on windows 7 , would all the latest macs run logos from windows through fusion very easily and fast , to put my logos 4 owindows version on the mac directly do i have to but the mac version .