I have a 2012 Mac Air, 4gb ram. It works fine for the most part. I mainly use it for floor planning events. It only gets slow after I’ve added too many components. I have dynamic component tables with multiple chair settings and when I have a plan with more than 10 tables and each has 10 chairs, things tend to get a little laggy. This is after I’ve already changed most circles in my drawing to 8-12 sides to minimize lines/faces.
Rendering is another story, pretty slow, for large floor plans, I just leave my computer on to render over night. But there has been times (back when my circles were default 24 sides) and the rendering process was just too slow (running over 12 hours) and I just gave up.
But when drawing up interiors with decent details, it’s works great.