MacBook Air lasts up to an incredible 12 hours between charges. So from your morning coffee till your evening commute, you can work unplugged. When it’s time to kick back and relax, you can get up to 12 hours of iTunes movie playback. And with up to 30 days of standby time, you can go away for weeks and pick up right where you left off. Instantly connect to an 802.11ac base station including AirPort Extreme or AirPort Time Capsule and experience wireless performance up to 3x faster than the previous Wi-Fi generation. 802.11ac also delivers expanded range, so you can work more freely than ever. macOS is the operating system that powers everything you do on a Mac. macOS Sierra introduces Siri to Mac along with more ways to enjoy your photos, shop more securely online, and work more seamlessly between devices.