Mac OS X has native support to PSMail’s Cabinet service with an encrypted connection and simple setup
In the Finder, select Go menu, click on Connect to server… and enter the URL https://email@example.com (firstname.lastname@example.org is your PSMail primary email address). If you plan to open a shared folder named “shared_files” from a friend whose email address is email@example.com, then the shared mapping URL is https://firstname.lastname@example.org/shared_files/
When prompted enter your PSMail email address and password
Once you have authenticated, you can now browse folders and use the files like a local drive
Note: Mac OS X system also creates a short cut available in your desktop for easy access.