Mac mini monitor problem

Test the monitor(s) on a ThunderBolt 2/MiniDisplay Port to HDMI adapter.

Belkin 4K Mini DisplayPort to HDMI Adapter - Apple

https://www.bestbuy.com/site/insignia-mini-displayport-to-hdmi-adapter-white/5813015.p?skuId=5813015

If that doesn't help, then schedule an appointment for your Mac Mini and have the Graphic's chip checked out.

Hi everyone,

I have also been having the same issue for about 6 months now. I thought it had disappeared with the latest macOS release (10.15.4) however after a few days it was back. The issue affects the TV app as well as YouTube in fullscreen in Safari, there could be others but those are my main uses. I should also note VLC never has this issue.

There are two "fixes" I know of right now;

1. Leave the mouse on the menu bar and the green tint disappears immediately - not a real fix.
2. Go to Settings → Accessibility → Display → Cursor. Change the size of the cursor to a larger size, resume playback, if it did not fix, go back and decrease the cursor size. It should then work, sometimes it takes two changes to the cursor size.

It's super frustrating and I hope Apple is working on a fix. It's definitely nothing to do with the graphics card of the Mac mini as it is fine in all other scenarios and as previously mentioned - when the cursor is on the menu bar.

My Mac mini (Late 2014) specs

Model Name:	Mac mini
Model Identifier: Macmini7,1
Processor Name:	Dual-Core Intel Core i5
Processor Speed: 2.6 GHz

My TV specs

Brand: Samsung
Model: UA55D7000
Resolution: Full HD
Connection via: HDMI

Here are a couple of photos of the issue.

Green Tint

Normal (hovering over menu bar)

I have had exactly the same problem. Changing color profile is one option, bit did not solve the problem completely. Changing the contrast slightly solved my issue. No green tint at all, no matter what you are looking at.

Appended screendumps, (look for the cursor) since I am running my system in Swedish. Good luck, and please post if this solution worked for you.

I have a Mac Mini connected to a Samsung TV. Has worked flawlessly until recently. Watching movies on Netflix or Apple TV app and the monitor will turn green. Move the mouse a little and it goes away for 3 seconds, then green again. Doesn't do it if I don't full screen Netflix. If I just resize the browser window to the maximum, it doesn't turn green but then I lose some of the tv size with the bar at the top and all the apps on the bottom. I think one of the recent software updates did it.

Mine is 2018, and yes same problem and mine is also an HP monitor. If I reboot it works, but only for a while. I've also tested the monitor with another computer and it's fine. Tried different HDMI cables, same problem.

This is clearly due to EMI noise in your setup. Is not an Apple issue and pointless waiting for a fix from them.

Try moving the mini to the extreme right outside the cabinet or on top next to the remotes using as short a cable as possible, preferably brand new HDMI certified.

Try also in no particular order: switching HDMI ports on the TV, distancing power cables from video cables by bunching them together then connecting to a power strip away from the video cables, unplugging all other boxes.

Etc. etc., you get the idea. Good luck.

Thanks, I will go through your suggestions. Although I'm curious as to why this would only effect video when playing through TV and YouTube but not when playing through VLC. Also why would playing in a window be fine? I would think it would be more of an all or nothing type of issue?

Thanks Johan_macmini,

I tried your solution about 3 weeks ago, and have had zero issues since. Thank you! The only problem is that contrast slider is so sensitive, even the slightest amount on changes the contrast quite substantially. Still better than the green tint though!

As stated before I did not think it had anything to do with EMI noise.

What year model Mac Mini and what HP monitor are we working on?

Have you tried a better grade of HDMI cable?

Your 2018 Mac Mini has different ports than the 2014 Mac Mini in this discussion.

You will need to use a USB-C/Thunderbolt 3 to HDMI adapter in one of the 2018 Mac Mini USB-C/Thunderbolt ports.

Tried that, still has problem.

I finally got mine to work by deleting the drivers for the Samsung tv I’m using as a monitor and then going back in and selecting the one that shows up again. Haven’t had a problem since.

Not really since different codecs are involved = different demands on graphics processing. VLC/window is the lowest bar, I wouldn’t read much into it.