LocationServicesEnabled mean on a MacBookPro Retina?
If your location services are enabled, all your MacBook needs is a Wi-Fi connection to figure out your approximate location, a lot like the iPod touch (see this question).
It does not have a GPS device to determine your location. This is described in HT4239.
Location services do not mean your computer has GPS capabilities but that it is using information that individuals provide, also google or other mapping servicing discover information from wifi broadcasts. Below is Apples take,
Your approximate location is determined using information from local Wi-Fi networks, and is collected by Location Services in a manner that doesn’t personally identify you.
My take, This can be fairly accurate as long as no one moves their wifi modem. For an example if an entire neighborhood moved two hundred miles away and did not change any settings (and were not remapped) ones computer would think it was in the original location.