When we talk about the new MacBook Air presented by Apple at its Worldwide Developers Conference, the incredible improvement in battery life comes to mind thanks to its new Intel Haswell processors, but in Apple's keynote in addition to this saving considerable battery, there was talk of another improvement implemented in these new Air Regarding the connection to wireless networks with the new 802.11 AC standard.
This novelty in the WiFi connection implemented in the new MacBook Air does not seem to be working very well and is being the main cause of some returns of the new Mac by some buyers. It seems that the problem can be fixed with a firmware update by Apple, but this is the price you have to pay for being the first company to sell compatible computers with this new connection standard.
The problem that users report is according to the news of Cult of Mac is that the Mac connects well at first and everything works fine until the MacBook you experience a sudden disconnection from the wireless network and the only way to reconnect is by restarting the laptop.
And is that wireless connections with WiFi 802.11 AC are still quite 'green' so it will be time for Apple to move a tab soon to solve this problem with the WiFi connections in the new MacBook Air, especially if we take into account that it does not have a port for connection via Ethernet cable.
More information - Airport Extreme and Time Capsule are upgraded to accommodate 802.11 ac WiFi