If you’ve been seeing issues with a flickering HDMI connection on your 2012 Mac Mini, Apple has heard your cries, and has now released an EFI update to address the issue. The problem was apparently related to issues with a video-related driver.
About Mac mini EFI Firmware Update 1.7
This update addresses HDMI video flicker issues on Mac mini (Late 2012) computers and is recommended for all users.
The Mac mini EFI Firmware Update will update the EFI firmware on your computer.
Your computer’s power cord must be connected and plugged into a working power source. When your Mac mini restarts, a gray screen will appear with a status bar to indicate the progress of the update. It will take several minutes for the update to complete. Do not disturb or shut off the power on your Mac mini during this update.
Mac mini EFI will be updated to 0106.03
The update weights in at less than 5MB, and is is available now through Software Update via the Mac App Store. The update is also available for direct download from Apple’s support site.
