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This happened to me once, and it turned out (after I took it in) that the temperature sensor was not working correctly. They replaced the relevant hardware and all was well. Since putting back the old drive did not clear the problem, it's worth checking if this may have somehow happened.


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Reset SMC If that doesn't help use a tool like Temperature Monitor to check the temp sensors. Perhaps one isn't properly plugged in.


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This works for me: https://www.i-tech.com.au/products/146188_Wavlink_WL_UG35D6_USB_3_0_to_DVI.aspx Note: in my experience, the more additional USB devices you have plugged in, the more likely your 3rd monitor is likely to not work (flicks on and off) due to, I assume, lack of power.


-1

Make sure all the ports don't have any dust In them and that all the cords work


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I don't believe it is a hardware issue because everything seems to work fine on Bootcamp. The only variable now is the OS. What happens if you unplug the adapter from the MacMini then plug it back in? Does it work?


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I apologize for necroposting (old thread) but I am compelled to correct one critical fact. I agree that it is generally fine to let your modern Mac run while leaving sleep and energy management to the operating system. But... Apple does not call "Shutdown" "Idle"! From Apple directly we have: https://support.apple.com/en-us/HT201897 Power consumption ...


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In fact if your mac mini support multi-monitor configuration (i.e. 2 monitors) and allows spanning your desktop then you can archive 4k@60Hz using 2 hdmi cables. Samsung UHD has 2 hdmi ports and it supports PBP mode (http://www.samsung.com/hk_en/support/skp/faq/1061869). Samsung UHD monitor emulates 2 monitors (picture-by-picture mode) with resolution ...


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You can do 1x hdmi 1x hdmi to mini display And 1x hdmi to hdmi-usb dongle The Mac mini only supports two monitors unless you mess with the graphics, so using the usb dongle tricks it. Warning (eats ram)


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Have you tried to stop powerd by Activity Monitor? This solved the CPU consumption for me. But after stopping powerd I got strange effect in Activity Monitor - it was like Update Frequency was changed from Often (2 sec) to Nonstop (0 sec), i.e. continuous without any delay. So I had to quit Activity Monitor too. After these operations and restart of ...



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