Trying to Find Photos on Harddrive from Photos App
Finding the Library

Pictures from photos are usually in a single big archive called Photos Library found in a user's Pictures folder. Go to the root of your hard drive (the root is what you see when you open it, before opening any folders inside it), and then open the following directories:

Users &gt; (your user name) &gt; Pictures


The library should be there.

Opening the Library

To open it, open Photos. The icon usually bounces into its place the Dock while Photos is loading the pictures, and then the window shows up. You will want to hold the option key before the window shows up (I usually do this by holding the option key when I click on the Photos icon). This will tell Photos you want to open another library, so instead of showing you the usual Photos window, it will open something like this:



Click on that Open Library... button and find your old library as described above.