Warning! Geek content follows! This evening I was trying to install gphoto2 on my MacBook, using MacPorts. It failed because the downloaded version of libexif-0.6.16.tar.bz2 was zero bytes. I only found this out when I looked at the actual file. I then downloaded libexif-0.6.16.tar.bz2 from the libexif website and replaced the faulty file with the newly downloaded one. The installation then went without a hitch. After attaching my Nikon D50, gphoto2 didn't want to make a picture. It turned out that when you connect a camera, there's an Apple application that wants to grab it. You have to kill /System/Library/Image Capture/Devices/PTPCamera.app/Contents/MacOS/PTPCamera first and then gphoto2 will happily snap way. The command to grab some pictures is gphoto2 --capture-image --interval 15 --frames 10 -P --filename=%y%m%d_%H-%M-%S.%C This will snap 10 pictures with an interval of 15 seconds.