Hello everyone. Yesterday got a refurbished Macbook 12" Early 2015, a base model with m3 processor. Well, I have noticed some lags in whole system. For example, in iTunes when scrolling albums and opening them. Looks like 5fps, or in Pages when scrolling through templates. I have compared with my Air Early 2014. In case of Air everything is fast. So I want to know, if notebook generally is slow or I got a defected one or...