How to Enable Bluetooth on a Mac 10.5.8by Travis Meyer
Apple computers that are compatible with Mac OS X version 10.5.8 contain an internal Bluetooth receiver that allows you to connect to a variety of devices, including headsets and keyboards. While the technical status of the computer's Bluetooth receiver is found in the "System Profiler," the device is controlled through the operating system's preferences panel. Once activated, the receiver automatically displays all of the discoverable devices in the vicinity.
Click the Apple icon in the menu bar and select "System Preferences" from the drop-down list.
Click the "Bluetooth" icon shown in the "Internet and Wireless" section of the System Preferences window.
Click the check box next to "ON" to enable the Bluetooth receiver in your Mac.