The Loop Browser is where you find loops to add to your project. Using keywords, you can search for loops by name, instrument, genre, and mood. You can also refine your searches.
Do one of the following:
Click the Loop Browser button 
in the control bar.
Choose View > Show Apple Loops (or press O).
Do one of the following:
Click the Button View button 
to see the category buttons. Click the category buttons to access the keyword buttons for that category. You can also Shift-click multiple categories for more keyword buttons. Then click the keyword buttons to see the matching files in the results list. If a keyword is dimmed, there are no loops that match that category. Your current selection appears under the name of the category button.
Click the Column View button 
to see a standard OS X column file directory that is hierarchically separated into All, Favorites, Genres, Instruments, and Moods search criteria. Select a keyword type in the left column, select a category in the middle column, then select a keyword in the right column to see the matching files in the results list below.
Click Loop Pack at the top of the Loop Browser, then from the pop-up menu that appears, choose the Loop Pack or folder with the loops you want to view.
Click the Reset button.
Enter a search term in the search field, then press Return.
The search term can be alphabetical or numerical. Any files that match your search term are displayed in the results list.
Do one of the following:
To view a recent search term: Click the magnifying glass icon at the left side of the search field, then choose a search term from the pop-up menu to display the results.
To clear a search term: Click the small “x” at the right side of the search field.
To clear all search terms: Click the magnifying glass icon at the left side of the search field, then choose Clear Search History from the pop-up menu.