Black glitchy screen only with cursor after installation

Let's start with the clover... The clover boots fine and so the installation of the macOS High Sierra. (took some time in clover configurator, but hey, it runs)

I normally format my drive and I start installing the OS. Everything is fine and is normal to this point. The system reboots and the installation continues. BUT!! When it's installed, some weird stuff is starting to happen. The progress bar and the Apple logo is glitchy as hell. When it comes to sellecting language, it shows only cursor and the language selecting menu. I somehow managed to set up the system, but then it becomes more glitchy and the desktop won't even load. But the system TECHNICALLY runs.

Specs: (Dell Optiplex 7010 sff) i5 - 3570 4gb ddr3 intel hd2500 120gb sata ssd

And no, "-v" shows no error, safe mode doesn't work either. I tried several boot flags (mainly IGPU focused) and nothing is working

I tried Catalina, and it works normally. (I don't have gpu acceleration ofc, but it boots normally).

Interesting is, that the installation process (and eventuaĺy Catalina) is fine.

i will include some photos in the comments.

submitted by /u/Xportables
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