Apple on Thursday issued a software update for its latest 11-inch and 13-inch MacBook Air computers to fix issues with the screen and improve Wi-Fi connectivity. Some users had reported that their screens would flicker when using programs like Adobe Photoshop, while other were complaining of a bug that caused them to disconnect from Wi-Fi and would require a full system reboot to reconnect. Earlier reports had suggested that the company was still trying to pinpoint the problem and was replacing affected devices. The latest software update can be downloaded through the Mac App Store or Apple’s software update page.