The Finder
In Microsoft Windows, you may be used to clicking the Start menu to get to what you want. On a Mac, you usually use the Finder to access what you need. Anytime you double-click the hard disk icon on the desktop, which functions somewhat like My Computer in Windows,you open a Finder window, which allows you to navigate through all the contents on your hard drive. You can also make the Finder active by clicking the Finder icon in the Dock, or selecting any application, folder, or file in a Finder window.

The Finder functions somewhat like Windows Explorer. When you open a Finder window, you'll see a sidebar on the left that provides quick access to the Applications folder, your Home folder (your user directory, shown as a house icon in the sidebar), and several folders that it contains, including Documents, Pictures, Music, and Movies, in the bottom portion. You'll also see your hard disk volume and a Network volume in the top portion. When you mount a server or volume (such as connecting an external hard drive or iPod), or insert a disc, their respective icons may also appear in the top portion of the sidebar.

1. Close window
2. Minimize window
3. Expand window
4. Forward / Back buttons
5. View as icons
6. View as list
7. View as columns
8. Cover Flow view
9. Quick Look
10. Action menu
11. Search field
12. Hide/show toolbar and sidebar
13. Volumes
14. Places
15. Search options
16. Divider; drag to resize pane within the window
17. Window resize control
18. Contents

When you select (click) any icon in the sidebar, its contents display in the window's right pane. For example, if you select your Home folder (the "house" icon), you'll see several folders in the right pane, some of which are shown in the screen shot above. If you select the Network volume, you will see the computers connected to your network. If you select, for example, a CD in the sidebar, you'll see its contents in the right pane. Alternatively, you can also double-click a mounted volume, disc, or hard disk volume on the desktop to open a Finder window that lists its contents too.

If you'd like to change how folder and volume contents appear in the right pane, click one of the view buttons in the toolbar. The Finder window, by default, displays contents in icons view. If you'd like to see more information about the contents in a selected folder or volume, click the list view button.

In list view, the Finder window displays some extra file and folder information, such as the last date the item was modified, the file size, and what kind of item it is. You can sort the list by name, date modified, size, or kind by simply clicking the respective column header.

If you'd rather see your stuff displayed in a more hierarchical fashion, click the columns view button. In columns view, the right pane splits into multiple columns to display your computer's file and folder organization, like this:

Find stuff fast
Mac OS X 10.4 and later includes Spotlight to help quickly find files on your computer or any mounted volume (for more information about Spotlight, see "Mac 101: Spotlight"). If you need to find something, just type what you're looking for in any search field in any window—or click the Spotlight icon in the upper-right corner of your screen.

As soon as you start typing, Spotlight dynamically displays results that match your criteria in the Finder window. You can choose where you want Spotlight to look by clicking on an item in the header (such as Servers, Computer, Home, and more) that appears just below the search field in the Finder window. Spotlight will scour the location you select and organize its search results by kind.

For example, if you wanted to find JPEG images on your Mac, type ".jpg" in the search field, and search results will quickly appear in the window. Not only will Spotlight display thumbnails of your JPEG images, it'll also list other things that match your criteria, such as documents that contain the word ".jpg" in them.

The menu bar

Unlike Windows, which places menus at the top of program windows, Mac OS X features a dynamic menu bar at the top of your screen. The menu bar's menus change according to the active application. Although they reside in a different place than what you may be used to, Mac menus function the same way as they do in Windows. (For more information, see "Mac 101: The Menu Bar.")

You may be wondering how you're going to access the shortcuts menu with an Apple mouse. Or, you may be wondering how to "right-click" in Mac OS X. To do this, simply hold the Control key and click an item or the desktop (Control-click it). If you decide to use a third-party multi-button mouse, you can right-click items as you normally would. See see Switch 101: On Windows, I used to... for more information.

[Source: Apple Technical Articles]