My first hunch was that something was going wrong with this. Disabling it via LCD Font Smoothing helped somewhat, but the overall image was still noticeably worse than I had experienced before.
When a display is first connected, it identifies itself and describes its capabilities by providing a blob of bits called the Extended Display Identification Data EDID. The Wikipedia page helpfully provides the full spec. My Dell emits 11, meaning that it claims to support all three color modes.
Mac Mini No Video output to display! | MacRumors Forums
Ah, I see. I thought I am going mad. Talked to dell support, than Apple. Noticed color format, tried to mess with monitor settings. Glad I found this article! Thanks so much for this. I tried this but my screen actually looked worse! I mean my screen was pretty good as it was and I thought this would give me a pure RGB to the display but I think in my case something is not right. From what I understand a true RGB signal should be such that the color settings on the display should refuse to be adjusted as the display color signal is now being driven by the computer but in my case I can still adjust saturation and such which makes believe something is not right to start with.
Also, I lost the underscan and overscan features, after this change the display is being overscanned. I wish there were a terminal command that could identify if I am indeed sending out a true RGB or what. I have to investigate this further. I spent way too much time trying to fix it with font smoothing :s. Also, for others reading these comments in the future, I have the same monitor as the author. All hardware involved:. This was really helpful, thanks. I was worried that it was all in my head or that I needed another cable or something. It is so much better now. Thank you so much that just helped me a lot.
I also have a Dell monitor. What I found out is that it could be due to the graphic drivers. My quadro k shows the rgb color, my rx always shows the other color space yr…. I noticed immediately that clarity was sub-par on a number of os elements, especially red. It looks like the os decided to default to YCbCr which is causing significant degridation of the video quality in the red side of the color space.
I have an eGPU on order, but really want to figure this out before then.
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I notice it in the edges of reds the most, just as you do. I just bought the Mac Mini, and when I started migrating my system from my rMBP, I though my eyes were playing tricks on me; on my 4K screen that was working perfectly fine with my old computer, I now saw washed out colors, blurry fonts, the whole shebang.
After trying everything else I could think of in terms of hardware and software, I started googling, and found this page.
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I will forever be grateful to you. Shame on you, Apple! Since writing this I upgraded to a 4k display Dell PQ , and it has the same problem, though the symptoms are much less apparent at higher pixel density. Thank you very much John for documenting this. EDID revision………… 1. Digital DisplayPort Color bit depth………. Apple is terrible,. Any ideas? Great post. Quit blaming Apple for your monitor issues people.
So here you are fighting to get your Dell working too. My monitor, thankfully, powers on every time when connected to my computer. Thanks for your solution. I think you found a way to fix it. It worked for me. I had this issue for a while. I got a new adapter CableCreation was the name of manufacturer, I think and it resolved my problem. Thanks so much for sharing this! Thank you so much! This trick saved me a lot of money and trouble.
So I tried all of the above and nothing worked. Was strange, the external monitor looked great when the macbook was closed. When I unchecked it, things went back to normal. Your email address will not be published.
Delete them, then reboot your Mac and try to download macOS Catalina again. You may be able to restart the download from there. If you are having this issue, try starting your Mac in Safe Mode hold down Shift on the keyboard while it boots , then try downloading and installing macOS Catalina again. If your macOS Catalina problem is in installing the operating system, first make sure you check out our how to download and install macOS Catalina guide, which will take you through the steps you need to take to safely install the new operating system.
First of all, you'll want to make sure you have a Mac that can run macOS Catalina. The following Macs are compatible:. Double-clicking the file should begin installation. If this is the case, you'll need to force a reboot of your Mac or MacBook. Don't worry, the 'Setting Up Your Mac' message means the update is finished, so you won't lose any data or damage anything by restarting your Mac.
To do so, press and hold down the power button for a few seconds until the Mac or MacBook turns off. Wait a few more seconds, then turn it back on. If you're having trouble logging into your Mac or MacBook after installing macOS Catalina, or you're stuck in a loop where you log in, then get logged out again, the following steps might help. This removes a file, which makes it appear like you're starting Catalina up for the first time. Don't worry, nothing important is getting deleted.
Press Enter, then restart your Mac. Some readers have got in contact to let us know that they are experiencing problems with the Mail app in macOS Catalina. If you use Mail to read and send emails, and it's not working correctly after installing macOS Catalina, read on to find out how you can fix the most common issues. If Mail keeps crashing while you use it, open up Finder and then click on 'Go' from the top menu and select 'Go to Folder'.
Find com. MailServiceAgent and move them, either to Trash or somewhere temporary like your desktop. Empty Trash, then restart your Mac and see if that works.
There are reports that the search function no longer works in the Mail app after installing macOS Catalina. The first thing to try, if you encounter this problem, is first close Mail completely. Then hold Shift and click on the Mail icon to open it in Safe Mode. Then, close Mail again, then hold Shift and open Mail again.
Finally, close Mail yet again, then reboot your Mac. Open Mail normally, and search should work again. Reboot the Mac and load up Mail to see if search works. Once macOS Catalina is installed on your Mac or MacBook, you may notice that your device is running slower than before. If macOS Catalina also showed a notification that said "Optimizing Your Mac: Performance and battery life may be affected until completed," then this is normal, as macOS Catalina is doing things behind the scenes which can initially impact performance.
After a day or so, your Mac should be running just as well if not better as before. If you don't see an improvement by then, try restarting your Mac or MacBook.
Another thing to check is to make sure that all of your apps and software are updated to the latest version. If any of them have issues with Catalina, that could be slowing down your machine. You can also open up the Apple menu and select 'System Preferences'. Select 'Login Items' and then select the apps you want to stop opening at startup and click the small minus sign below the list. It's also worth making sure all of your apps are updated.
Check the App Store for any available updates, or the app's website. You can also try restarting your Mac to see if that helps. If it doesn't, force-quit any apps that appear to be taking up a lot of RAM. Its CPU tab lists active processes, with a real-time view of what's going on. To force-quit an item, click it in the Activity Monitor list, click the X at the left of the toolbar, then confirm you want to force-quit. Also delete the cache.
Open the Finder window, select 'Go' from the top menu and select 'Go to Folder'. Remove the data from inside every folder. As with the performance issues above, you may find that at first your MacBook's battery life is a lot shorter. Again, this is probably because macOS Catalina is doing some background work to set itself up — and after a few hours or a day, things should have settled down and your battery life should be back to normal.
Get help with video issues on external displays connected to your Mac
If it isn't then make sure all your apps are updated. You can also click the battery icon on the top menu bar, which will show you what apps and processes are taking up a lot of your battery life. Close those and see if the battery improves.
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