Hello, I recently bought a Macbook Pro 13 inch with the following system config (i5 processor 2.5ghz, 4gb RAM, 500 GB HDD). I was thinking of running VMware fusion 5. But my concern is will it slow down my system. I understand if the VMware slows down my MBP when VMware is running, but will it slow down my Mac performance even when the VMware is not running. IF I can install VMware Fusion how much RAM memory should I allocate? Any help is greatly appreciated. If there is another thread which already answers this concern please direct me there, I was not able to find a similar thread that is why I created this. Thanks.