So opengl or metal helps boost fps?
OpenGL probably decreases FPS. Metal can most likely help with FPS.
You should replace the parts. I think a new graphics card could work
As a former MacBook user, use the minium graphics if you are more focussed on FPS.
There is no notable difference (appearance-wise) in most graphic levels below 5 unless you account for render distance.
Use Metal. Itβs the graphics API built by Apple for Mac and it will have the best performance.
Should I also disable frame rate manager with it?