"Why my MacBook is slow"에 답변i've been looking into this for months - it started after I updated the ios.... Programmes took ages to load. Activity monitor showed CPU idle 90% + and memory 4GB available... This just worked for me... I think the updgrade started icloud syncing desktop / document folders. Now I've stopped it things are much better. Also I removed clean my mac and hp utilities as other posts have said this can cause memory leaks.