Where on the file system are my photos imported to?
Solution 1:
If you're using the Photos application then your imported pictures can be found at:
~/Pictures/Photos Library
This is a special folder. If you double click on it in Finder it'll open the Photos application instead of showing you the contents of the folder. To see the contents, right click on the folder in Finder and select Show Package Contents
from the menu.
Once you're inside the special folder the unaltered master photos are in the Masters
sub-directory sorted in to year and then month then day sub-folders.
If you're trying to find the path to the location from a Terminal command line it's:
~/Pictures/Photos Library.photoslibrary
Solution 2:
As long as you don't click "import" in the Photos app, the files are still on your camera's flash drive and not actually imported to you hard disk.
The camera's filesystem should also be mounted in the Finder. On the command-line, all mount-points are accessible under /Volumes
.