Apple hasn’t gotten around to adding an LTE chip to our MacBooks, but with Yosemite and an iPhone running iOS 8, you won’t need one. When your Mac is within Bluetooth range of your iPhone (and personal hotspot is turned on), you’ll see a new network option when you click on the Wi-Fi menu-bar icon. Select it and you’ll connect to your personal hotspot in an instant, without even needing to type a password. (MacLife)