Apple has updated Bluetooth for Mac OS X, bringing the software to version 1.5. Bluetooth is a wireless technology that allows a Mac to communicate with peripherals. Appleis release notes are shy on details, but the newest version seems to add support for more headsets and printers. Those release notes:
Bluetooth 1.5 for Mac OS X provides support for Bluetooth enabled headsets and printers.
NOTE: Headsets must support the Bluetooth headset profile and printers must support the Bluetooth HCRP profile. In order to configure and use a Bluetooth headset, the Bluetooth module must have the latest Bluetooth firmware from the Bluetooth Firmware Updater application version 1.0.2 or later (http://www.info.apple.com/usen/bluetooth/).
For information about using Bluetooth 1.5 or about making your Macintosh Bluetooth-enabled, visit the Apple Web site at http://www.apple.com/bluetooth/.
You can find the update in the Software Update Control Panel. The download is 6.1 MB. You can find more information on Bluetooth itself at Appleis Web site.