Apple Thunderbolt Display: Image on display intermittently goes dark, USB devices not available after waking from sleep
Apple Thunderbolt Display (27-inch), Mac mini (Mid 2011), Mac mini Server (Mid 2011), MacBook Air (11-inch, Mid 2011), MacBook Air (13-inch, Mid 2011), MacBook Pro (13-inch, Early 2011), MacBook Pro (15-inch, Early 2011), MacBook Pro (17-inch, Early 2011), iMac (21.5-inch, Mid 2011), iMac (27-inch, Mid 2011)
In rare instances you may notice the image on your Apple Thunderbolt Display (27-inch) disappears or goes dark intermittently during normal use. Some USB devices may not available after waking your computer from sleep.
Make sure all available software and firmware updates are installed and applied to your display.
- Choose Software Update from the Apple menu ().
- Install all available updates.
- Re run Software Update again to make sure all updates have been applied.