I've been searching for a fix to Mac Mini's blurry HDMI issue. Saw a link to a script and disable SIP and copy to an overrides folder. That fix didn't work and it limited my resolution to lower. I have a gaming monitor, Acer Predator XB271HU, it's a 2560x1440 IPS with 165hz refresh rate. It only has 2 inputs, HDMI and DisplayPort. My 2013 MacBook Pro has no issues going HDMI to HDMI. Texts and pictures are clear compared to this Mac Mini. I used to have this Mac Mini connected to an older monitor, 24" TN panel with 1080p max resolution support. I connected it via DVI-D and didn't experience issues with blurry texts. Now that I have a monitor, a better one at that, with no DVI, it seems my Mac Mini experience has downgraded. Anything else to try? I've tried SwitchResX and bumped up the resolution to match my monitor (2560x1440p) but the image is still blurry. I'm looking to sell this Mac Mini if anyone is interested. PM me.