Right on the heels of iOS 7.1.2, Apple has released an update to OS X Mavericks in the Mac App Store. Version 10.9.4 of Mavericks features a fix for a bug many have been experiencing related to Wi-Fi connectivity.
There has been a known problem in OS X that keeps some Macs from automatically connecting to Wi-Fi after being woken up from sleep. Apple has addressed the issue in 10.9.4 along with general reliability improvements for waking from sleep. Safari 7.0.5 is also included.