Southwest Airlines today released Ding for Mac users, a specially designed tool that brings live updates of southwest.com offers directly to users desktops. The program runs natively on both PowerPC and Intel-based Macs, and provides quick, easy access to southwest.com travel tools such as "online checkin" and flight status. Once installed, the software will produce an audible notification when new offers arrive from the airline. Additionally, users who download and install Ding for Mac or Windows between now and April 3rd, 2006 and who keep the software on the desktop for 30 days afterward will receive two "Rapid Rewards" credits. Ding requires Mac OS X 10.3.9 or later, and is available as a free download.