I'm not sure if this is a bug, or a feature request, or a stupid newbie issue, but I have a 3TB external hard drive on which I place all my astro images. It looks like in the file explorer will only go to the system root, and not look at all the volumes attached to the computer. I'm using Mac OS X 10.7.5 on an early-2008 MacBookPro. The external hard drive is a USB LaCie 3TB model.
Oh, and I'm using PI 01.08.00.1023 Ripley (x64) RC7.
Is there some way to do this that is eluding me?