Last night Apple released the Mac Mini EFI Firmware 1.7 update mainly for the Mac Minis released this year, the software solving the problems of displaying images on the monitors connected to the device. The update can be installed using the Software Update system or by downloading it from on the Apple website.
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
