To do so, execute this command in a terminal: Test that your camera is connected and working.In fact, killing the PTP daemon is the answer to many weird gphoto errors on Mac OS X. You will have to repeat this entire process every time you plug the camera in to your laptop, or if you turn the camera off and on again while attached to your computer. But this also means that gphoto doesn't 'own' the camera, and can't use it. This isn't as evil as it sounds! Mac OS X automatically 'grabs' the camera when you plug it in - this is how iPhoto and other programs can automatically download your photos. For Mac OS X users only: kill the PTP daemon.I recommend using a laptop, so that you can move the camera to your favorite shooting location. If you normally use a card reader or some other method, you will need to locate a USB cable which lets you connect your camera directly to the computer - typically cameras come pre-supplied with these. This should be the normal USB cable which you use to connect your camera to your computer when downloading photos. Connect your camera to a computer using a USB cable.To set this, press the Menu button, then choose 'Setup', then 'USB', then 'MTP/PTP' and hit OK. Here's an example for the Nikon D40x (my favorite camera) which works on most Nikon DSLRs. Many cameras work in either their normal mode (requiring no special setup), or PTP mode, which is a standard allowing computers to control cameras.

Every camera is different, and your best resource is the user's guide. This is usually in a 'setup' or 'options' menu, and it's a rarely changed option. You now need to change your camera into this mode. Find your camera in the list, and look for the text in parentheses at the end - for example '(PTP mode)'. To figure out which mode you need, look on the list of supported cameras. This isn't the exposure mode, but rather the mode which controls how your camera talks to your computer.

Set your camera to the correct connection mode.

There are a few basic steps to getting your camera ready to work with gphoto: To be sure, you can check out this complete list of supported cameras. Almost all digital cameras made in the last 10 years - whether point-and-shoot or DSLR - will almost certainly work with gphoto.

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