Are you in possession of a new Mac Mini, but you also have to deal with problems with the HDMI connection? Then you are unfortunately not the only one. Fortunately, Apple tonight a firmware update for the Mac Mini (2012) which is available from October. The update would ensure there is no longer a flicker is visible when the Mac Mini is connected via HDMI.
It seemed at first that the problem was related to the drivers from Intel, but the problem is at least solved through an official firmware update from Apple. The update is now available through the Mac App Store.
The Mac Mini EFI firmware update brings the version number to version 1.7. The update weighs only 5MB and is also available from the official Apple Support page .
Download: Mac mini EFI Firmware Update 1.7