I am a user of apple aperture. I have a 13" macbook pro with a 250 gb hard drive. I'm getting to the point where I am filling my hard drive and have to move my master files about every 4 months to an external hard drive. I've been using a network hard drive in my house to move them to. It's not the most ideal way to do things, and I'm not doing very good at backing things up. I just upgraded from a XSI to a 6D. My files are growing exponentially now. I shoot in raw so I already have huge files. Does anyone else use Aperture on a macbook pro? I was curious what your work flow is.