How to Access Your iPhoto Library Without Opening iPhoto
Apple's iPhoto program ships with every new Mac sold. It provides an easy way to organize and view your pictures. However, you may have a hard time finding your iPhoto library when you go to upload a file on the internet or if you want to copy a specific image to a USB stick or DVD. Although iPhoto includes an export function, there are times you may prefer to use Finder to manage your photo files.
Switch to "Finder" by clicking on its Dock icon. Click the "New Finder Window" option from the File menu.
Scroll down in your user folder and open the "Pictures" folder. Locate the "iPhoto Library" file. Press and hold the "Control" key while clicking on the "iPhoto Library" file.
Click the "Show Package Contents" option. Open the "Data.noindex" folder. This folder contains all your pictures sorted into folders by date.