Owners of the Apple LED Cinema Display 24-inch (introduced in 2008) may experience problems when connecting the display to a Thunderbolt port: An “intermittent flicker.” The 24 Inch LED Cinema Display randomly goes black for a second. Don’t worry Apple has a fix for this – quietly hiding in the support section. (It does not show up via your regular software update). So just download the Firmware update yourself, follow instructions and you’re good to go.
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