Macbook Air failing to reconnect to network after sleep I have a Mid-2011 13" Macbook Air running OS X 10.9.2 (the latest version). When I wake my Mac from sleep, sometimes, the Wifi will fail to find my network. The network icon will display the connecting symbol. The only way to stop that is to turn off wifi and turn it back on, where it will reconnect almost instantly.

A video I made showing my problem: http://www.youtube.com/watch?v=EtwPg9ff4WE&amp;feature=youtu.be
I've ran into this issue recently and solved it by unchecking:

System Preferences > Energy Saver > Wake for network access

See this thread on Apple forums - Wifi disconnects after sleep and takes long time to reconnect with Mavericks