![]() I believe they know about the problem but dont know if it really does affect all 2012 Mac minis using HDMI or if its just some. When your Mac mini restarts, a gray screen will. Your computers power cord must be connected and plugged into a working power source. The Mac mini EFI Firmware Update will update the EFI firmware on your computer. I did enter a bug into and it has been tagged as a duplicate of an existing bug and remains open. Mac mini EFI Firmware Update addresses HDMI video flicker issues on Mac mini (Late 2012) computers and is recommended for all users. ![]() If your mini shows the crushed whites - send Apple a message at /feedback. If you do see the alternating white/blue lines properly I'd be curious about what kind of monitor you are using and what display profile is selected. I have not been able to get a satisfactory calibration, and believe that its not really possible since the computer and display appear to disagree about which color space they are using. Some report improvement after using the calibration options in the System Preferences Displays Color options. Most people seem to drop the HDMI and use DVI or Display Port. ![]() This has been reported on the forums and apple support, but I have not heard of anyone finding a real resolution. Do you see the alternating light blue and white lines or is the whole window white? If it does look white, drag another window on top and see if the drop shadow reveals the alternating lines. If you use HDMI with your 2012 mini, try this - open up a finder window and switch to the list display. We have other Mac computers and laptops, and they all work fine with the same monitors/cables. Thats the symptom, and I believe that the real issue is that the computer thinks it is working in the RGB color space (as shown in the display profiles) but the monitors get a signal that tells them to work in the CMYK color space. The colors appear washed out - and the whites are 'crushed' (light colors appear white). With the 2012 Mac mini, every monitor I have access to does not display properly when connected with HDMI. I was excited to see this update, but sad that it does not fix my primary problem. Crushed Whites - RGB vs CMYK is NOT FIXED!
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