Older stock mid2010 mbp so I know it's getting on a bit, but it has always worked well up until Sierra. Now it is just constant beachballs and slow response. Really just use Safari and it has been really bad, seems like anything else I try to use is also really poor perfromance now as well. Is there anything I can do at all to help? Please, really need some help! For instance posting this topic probably took 5+ minutes because of beachballs.