Apple has begun warning users of its Boot Camp software that it will expire at the end of October.

The Cupertino-based company last week posted a technical support document indicating that some versions of the beta software have already expired and that the latest version will expire when Mac OS X 10.5 Leopard ships in October.

The support document notes that the license to use Boot Camp Beta 1.2 or earlier expires on September 30, 2007 and that the Boot Camp Assistant Beta will no longer open after expiration. Apple says that users can continue using Boot Camp Beta by upgrading to Boot Camp Beta 1.4, but warns that that “the license to use Boot Camp Beta expires when Mac OS X 10.5 Leopard is available to the public. To continue using Boot Camp at that time, upgrade to Mac OS X 10.5 Leopard.”