Windows Vista and 7

Open Windows Explorer and browse to the following directory

Note:  The AppData may be hidden so you will need to unhide hidden files and folders.

C:\Users\<profile name>\AppData\Local\Microsoft\Outlook\

Windows XP

C:\Documents and Settings\<profile name>\AppData\Local\Microsoft\Outlook\

The file should be called outlook.pst or archive.pst

Transfer the .pst file to your Macintosh computer.

On the Outlook for Mac File menu, click Import.
Click Outlook Data File, and then click the right arrow.
Select Outlook for Windows Data File, and then click the right arrow.
Locate the data file on your computer, and then click Import.
When the import process is complete, click Done.
The imported items appear in the navigation pane under On My Computer.