circle with slash

Hi, i have a Sony laptop that has 2 GPU's inside. Every time i want to install catalina in order to update the os i get a circle with line slashing it. Any Advice?

So for the most part I have got OSX Sierra working on my hackintosh with only a few minor bugs. The most annoying of those bugs is when booting into sierra it won't always boot. It'll hang on the apple logo screen for a second and either the loading bar will appear and it'll boot. or the apple...