f the image on the external Display attached to your Mac is blurry or does not appear as expected, please follow these steps. However, make sure that your Mac is running the latest version of MacOS before you begin.
If Your Display Appears Blurry
You should check the brightness and resolution of your Display if your images or text appear blurry or pixelated.
Adjust The Resolution
- Select System Preferences from the Apple menu, then click Display.
- Select External Display in the sidebar of the display settings to see other resolutions, then click on the scale while holding the option key.
- Click Done when you have chosen a resolution.
Check the description page to determine whether your Mac supports the expected resolution for your Display.
Adjust The Brightness
Pressing the brightness key on your keyboard will allow you to adjust the brightness of your Apple display.
In System Preferences under the Display section, you can also adjust the brightness for each connected Display.
Displays can sometimes be adjusted for brightness and color in ways that Apple does not control. You may want to check the documentation for your Display to see if it has built-in controls.
Scaling Issues Can Make Content Fuzzy or Blurry On External Displays
Scaling is the biggest issue. Video signals can be resized when sent to a display (including the built-in Display on your computer). Imagine you have an M1 iMac. If you choose the local scaled resolution of 4480 x 2520 (which exactly matches the display resolution), the Display will be unusable. Everything will be too small. The size of everything on the screen doubles when the resolution is lowered to something like 2240 x 1260, but the pixel’s match.
To maintain this crisp pixel shape on a 1440p display, you can usually select the 1080p scaling option. This is not the case with Macs. For some reason, Apple makes it difficult to display its retina signal on 1440p and ultra-wide displays. Unlike Windows, MacOS does not have the necessary scale options.
Pixels and Resolution Make Mac Content Sharp and Blurry
Graphics and text appear so fast on Mac displays because of their high resolution and pixel density. Apple displays are very high-quality. As an example, the M1 iMac has a resolution of 4480 x 2520 pixels, or approximately 4K, and 218 PPI. With a display resolution of 2560 x 1600 and a pixel density of 227 pixels per inch, the M1 MacBook Air is in the 2.5K range.
Your Mac sends an image to the display that is scaled. As a result, the images and text are very fast, and it is unlikely you’ll be able to see individual pixels.
You should also checkout these guides:
Sharp Text or Content Isn’t Displayed On 1080p Displays
Sadly, you cannot do much if you’re connecting to a 1080p display. The fact that they perform well and look great for some uses does not mean that they can display text and high-resolution images. You should upgrade to a faster display if the short text is significant. With MacOS, 4K displays would be the simplest solution, and you should be able to access fast text immediately after connecting.
But an upgraded external monitor won’t fix everything. Traditional 4K displays should not cause problems, but 1440p displays and ultra-wide monitors can.
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