Thessa is a beautiful and incredibly easy to use widget that allows you to control your Nest Learning Thermostat™, right from Notification Center in Mac OS X Yosemite. Simply click or drag the slider to change the temperature. Thats all there is to it! Additionally, Thessa can receive messages from your Nest Protect™, so you will instantly know when smoke or carbon monoxide has been detected. Control the temperature in your vicinity right from your iMac or even on the go from your MacBook. - Set the target temperature for your thermostat. - See the current temperature and humidity as measured by the thermostat. - Set states like Home, Away, Heat and Cool. - Receive notifications from your smoke and carbon monoxide alarm. - Supports both Celsius and Fahrenheit. - Supports multiple Learning Thermostats and Protects. Use of the Thessa Widget requires at least one Nest Learning Thermostat. Got an iPhone, iPad, or Apple Watch? Dont forget to check out Thessa for iOS in the App Store!