White borders around windows macOS 10.15

[leolb2615]

Hello,

after upgrading to macOS Catalina per patcher everything runs great, but I have white borders around macOS windows. This happens regardless if I'm using dark mode or light mode, in the pictures I am using dark mode. It did not look like this in High Sierra. Might this have to do with that my Mac only has a 1080x1920 display, no retina?

This is doesn't make it unusable, but as macOS itself is a very beautiful operating system the whole user experience does get a little worse when I encounter these borders. Does anyone know how to fix this?

I am running macOS Catalina on a 2009 iMac with a 3,06 Ghz Intel Core 2 Duo. It has a Nvidia GeForce 9400 graphics card which might be the problem.

 

[leolb2615]

Has anyone experienced this?

 

[greyeyezz]

You are running a newer OS on a thirteen year old iMac. If that's all the graphical glitches you are seeing consider yourself fortunate.

 

[MultiFinder17]

It’s a side effect of getting a version of Mac OS that expects a metal-capable GPU running on a machine without one. Odd little graphical glitches occur because your machine doesn’t support the Metal APIs properly. I have several machines running patched later versions of Mac OS, and it’s just a part of the patch life I’m afraid