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After installing the macOS Mojave update, I get a strange visual bug in the Dock from time to time. It disappears when I click on something in the Dock or if I try to make a screenshot (that's why I had to capture the screenshot using camera instead of screenshots).

  1. There is a horizontal line between the Mail and Calendar app icons and one in the middle of the Notes icon:

enter image description here

  1. There is a horizontal line in the middle of the ForkLift icon:

enter image description here

Note: When installing the macOS Mojave update, my Mac got stuck on the analytics screen (like described here: Mojave install froze on "analytics", successful force reboot- but did it miss anything?) and I had to restart it manually. Maybe that has corrupted my installation?

I'm using macOS Mojave 10.14 on a 2014 MacBook Pro.

Does anyone know how I can fix this?

Edit:

It looks like that this bug isn't linked to specific icons on the Dock. It appears randomly and disappears when I click on the dock. It looks a bit like it only appears next to active apps most of the time. It's still present after several restarts of my MacBook.

enter image description here

Edit 2:

I was able to reproduce this bug. I appears every time I minimize a window. You can see it here: enter image description here You have to look closely to the Postman icon (the 6th from the left), the Mail icon (10th) and the Notes icon (12th) after I minimize Chrome. You can see the bright square until I click on the Chrome icon again.

Edit 3:

I updated my Mac to 10.14.2 and the bug still appears.

  • 1
    Can you edit your question to explain the 'visual bug' that you see? I'm not able to see anything wrong in the images, maybe I'm just missing it. – fsb Oct 25 '18 at 14:12
  • I did so. I know that it's really hard to see on these images. – Peter Oct 25 '18 at 14:18
  • Have you tried just reinstalling the system again, and letting it complete fully. That may not help but its such an easy first step its well worth a shot. – l008com Oct 26 '18 at 8:38
  • Would that override my OS settings and app installations? I hesitate to do this because I need this MacBook for work. – Peter Oct 26 '18 at 8:53
  • There is a more recent update 10.14.3. Maybe updating to that will help? – chrisdahfuh Feb 27 at 15:13
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I have this exact problem while connected on an external monitor using a Macbook Pro 2017. The problem is the window animation, I experience this problem using the Scale Effect animation but it disappears as soon as I am using the Genie Effect. That's an acceptable workaround, still I wonder how this is not fixed on Apple's side.

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