hello so i think to buy a mac pro 1.1 from 2006 12 gb ram 2 xeon 2.66 any idea can i go above 10.7.5 or to stay on 10.7 i gonna used it for basic things microsoft office youtube movies and things like that i gonna update the video card if it need its cost 200$ is it good ? i just wanna use this computer in 2019