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I tried to minimise my Visual Studio window and this happened as I moused over the dock. The screen remained like this for more than a minute. Could this be a virus on my computer?

  • 6
    It looks to me more like faulty GPU.
    – Skye-AT
    Commented Apr 7, 2022 at 9:18
  • 3
    Or a bug in the macOS graphics driver/stack. A virus is highly unlikely, for a lot of reasons (for one: it would need to interfere with the graphics or window manager stack somehow).
    – DarkDust
    Commented Apr 7, 2022 at 11:04
  • Does a reboot fix this?
    – lhf
    Commented Apr 7, 2022 at 14:51

1 Answer 1


No, that is not a typical indication of a virus on your computer.

Could it in theory be a virus? - Yes, in theory.

Is it in any way probable in a practical scenario? - No.

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