I've been getting these black bars that look sort of like bar-code/qr-code showing up around windows and sometimes in the menu bar.
This thread has me thinking it's a RAM issue. That sounds reasonable, as it seems to happen after I've used minecraft and left the computer on for a while. I think a PRAM or SMC reset might work, but I'm more interested in why this happens. Does anyone know where I'd be able to learn more about this/be able to explain whats going on?