I do edit 25-30MP RAW images in aperture, but at times i'll experience a really bad beach ball that will last for a while. A few times i've even had to hard reboot because nothing but my cursor was responding. I understand that I only have 4GB of RAM but I don't see why 4GB wouldn't be enough. No other applications are on other than safari sometimes. Is it the RAM? Any opinions would be appreciated. Thanks in advance.