Come now, If i can use unity on Windows XP (granted an outdated version of unity) I'm sure yours is fine unless your setup is somehow older than 2006?
Viewing post in New Game Engine
That is more an issue with the OS, not the age of the system. ChromeOS is pretty much a web-oriented Linux distro with a focus on web apps that run in a browser and android apps, but there is a full Linux environment available. And it looks like the 2021 and 2022 versions of Unity do have support on ChromeOS.