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5. Documents, Programs, and Dashboard > Installing Mac OS X Programs

Installing Mac OS X Programs

In general, new programs arrive on your Mac via one of two avenues: on a CD or DVD, or via an Internet download. The CD method is slightly simpler; see Performing the Installation later in this section.

For help installing downloaded programs, on the other hand, read on.

.sit, .zip, .tar, .gz, and .dmg

Programs you download from the Internet generally arrive in a specially encoded, compressed form. The downloaded file’s name usually has one of these file name extensions:

  • .sit indicates a StuffIt file, the standard Macintosh file-compression format.

  • .zip is the standard Windows compression file format. And because Tiger has a built-in Create [.zip] Archive command right in the File menu (and doesn’t come with StuffIt Expander), .zip is becoming the new standard Macintosh compression format. (It certainly makes life easier for people who have to exchange files with the Windows crowd.)


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