Part of the answer may be in how old it is. In addition to the HDMI resolution issue being documented by the manufacturer themselves as mentioned in the other reply, I have owned the same monitor for 7 years and plugged three different Mac generations into it spanning 12 years, I own many HDMI cables, and the results are always the same: The PA272 only does 1920 x 1080 if you use an HDMI cable. (Yes, I have plugged two Macs into it, the monitor can then be configured as a KVM through the NEC MultiProfiler software so both Macs share and switch between a single keyboard and mouse.) I avoided all problems by plugging my Macs in through DisplayPort and Mini DisplayPort, been working great for years. This problem usually comes up plugging in pro video equipment, not a Mac. If your use is pro video, the HDMI input seems to be RGB only so doesn’t work right with HDMI signals in YUV.

If you use HDMI, read the SpectraView release notes for potential problems, under the heading “HDMI and video graphics adapter driver settings” If you also got the NEC SpectraView software to do calibration, it is much easier if you use DisplayPort/Mini DisplayPort. When it seems “a tad less sharp” over HDMI, what resolution is being reported in macOS and on the display hardware? If it is not 2560 x 1440, HDMI is not reaching the full resolution. If your use is casual, it doesn’t matter which one you use. It seems something is happening in the communication between the two devices during (re)booting.I have the same monitor. After switching the monitor on all worked fine. Update 1: When I boot the Mac mini with the monitor powered off it will boot properly. Is there anything that might cause this behavior? So booting with something connected to the miniDP output doesn't seem to be the issue perse. In the past this same Mac mini was connected to low res monitor with a miniDP dongle that connected to a VGA cable. When I boot the Mac without the cable connected (a mini-DP -> DP cable) it boots fine and when I connect the cable after it has booted I also get a picture without issues (proper 4K resolution).īut when the cable is connected (tried with two separate miniDP->DP cables) the Mac simply won't boot. I can tell because the light on the wired mouse doesn't light up. I have tried various cables (HDMI -> DP, mini-DP -> DP) but when I connect those the Mac doesn't seem to boot properly. So I need to connect something to the monitor's full size DisplayPort port. But I also want to connect my Switch to this monitor and since that only has HDMI output that is taking the single HDMI input on the monitor. I have a Mac mini (late 2014) that I'm connecting to a 4K Iiyama B2875UHSU monitor.

Mac mini dp to hdmi