Mac OS X in a Nutshell

Hidden Files

By default, the Finder hides many files and folders from view, including the entirety of Darwin’s diretory layout, under the philosophy that most Mac OS X users will never need to access the system’s Unix underpinnings. Savvier users, on the other hand, have a number of ways to see and work with all the filesystem’s files.

Seeing Hidden Files

There are two ways to see files that don’t appear in the Finder. The most direct way involves simply viewing a folder’s contents by dropping into the Terminal and running the ls command on it. The Terminal sees the world simply as a tree of directories and files, and nothing more; files that have special, Mac-specific system roles appear like any other file. (However, you’ll have to run ls with the -a flag.)

The other way involves changing the Finder preference that keeps these files hidden from sight. (Apple gets points for making this a user-adjustable preference, albeit not a very obvious one.) You’ll need to add a value to the Finder preferences’ file. You can accomplish this by operating the defaults command-line program on your com.apple.finder user defaults domain (described in Chapter 22), or by directly editing your /Users/ username /Library/Preferences/com.apple.finder.plist file with the Property List Editor application, as shown in Figure 9-2.

To add a value to the com.apple.finder.plist file, follow these steps:

1. Launch the Property List Editor (/Developer/Applications).

2. Open the com.apple.finder.plist file located ...