Os X Mavericks - Wireless connectivity

Your Mac uses two main methods of wireless connectivity. Bluetooth and Wi-Fi. Wi-Fi is used to connect to a wireless network. By clicking on the Wi-Fi menu in the Menu Bar, you're provided with a list Wi-Fi networks your computer can connect to. In this case, this network has a lock which means it requires a password. Upon providing the correct password, your Mac will then connect and show a signal strength in terms of quantities of bars. At any point, you can switch to a different network, or you can turn W-Fi off if you're not going to be using Wi-Fi for an extended period of time. Wi-Fi may also be useful for transferring data between Apple computers using AirDrop. If you're using a desktop computer, such as an iMac or a Mac Pro, you may not need to use Wi-Fi if you have an Ethernet cable connected directly in, which is a wired method of using the internet. Bluetooth allows you to connect your Mac to other Bluetooth devices such as wireless mice, keyboards, or speakers. If you aren't pairing a Mac with other Bluetooth devices, it's recommended to turn that off by clicking on the Bluetooth menu and selecting "Turn Bluetooth Off." This will save battery life if you're using a laptop.