A computer must have a Bluetooth adapter in order to be able to communicate with other Bluetooth devices such as mobile phones,  keyboards etc. While some desktop computers already contain an internal Bluetooth adapter, most require an external Bluetooth dongle. Most recent laptops come with a built-in Bluetooth adapter,there fore they are more user friendly.

Apple has supported Bluetooth since Mac OS X version 10.2 released in 2002.Of Microsoft platforms, Windows XP Service Pack 2 and later releases have native support for Bluetooth. Previous versions required the users to install their Bluetooth adapter's own drivers, which was not directly supported by Microsoft.Microsoft's own Bluetooth dongles have no external drivers and thus require at least Windows XP Service Pack 2.