Can’t install latest Sonoma update

Hi. I am using Sonoma on my 2016 MacBook Pro.

With the OCLP 2.1.2 I am now facing the following situation:

I have a very laggy experience with frequent crashes, suggesting that I am running without graphics drivers from the root patches.

I can’t install the root patches, because a Sonoma update is waiting to be installed.

But when I start the update, the Mac wants to reboot but does so without doing the actual installation. So I am back at the beginning again. 🤔

Does anyone know how to solve this?

Thanks!