The Mac's Finder displays a list of Favorites: files, folders and drives that are frequently used and can serve as clickable shortcuts. In addition to the Finder's default Favorites, which include the Desktop and Document folders, you can add your own files to Favorites with a simple drag-and-drop operation. You can see the Favorites in the Finder's sidebar.
Add Favorites
Step 1: Start Finder
Launch the Finder by clicking its icon in the Dock.
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Step 2: Locate File, Folder or Drive
Locate the file you want to add to Favorites by browsing through folders.

Step 3: Select a File, Folder or Drive
Click and hold on the file you want to add to Favorites. Drag the file over to the Favorites heading in the sidebar. Note that an oval appears around Favorites.

Step 4: Release Mouse Button
Release the mouse button. Your file appears in the Favorites list.

Remove Favorites
Step 1: Start the Finder
Launch the Finder by clicking its icon in the Dock.
Step 2: Select Item to Remove
Right-click the entry under Favorites that you want to remove. A short pull-down menu appears.

Step 3: Remove Item From Favorites
Click the menu entry Remove from Sidebar. The entry disappears from Favorites, although the original file remains on your hard drive.

Tip
You can undo a removal by clicking the Finder’s Edit menu and selecting Undo, or by pressing Cmd-E.