Mac OS X 10.9.4 was an update to Mac OS X 10.9 released on June 30, 2014. It had the following features: * Fixes an issue that prevented some Macs from automatically connecting to known Wi-Fi networks * Fixes issue causing the background or Apple logo to appear incorrectly on startup * Improves the reliability of waking from sleep * Includes Safari 7.0.5 For detailed information about the security content of this update, see Apple security updates.