No doubt this topic has been exhaustively discussed on the forum, but I have one question: can restoring the MacBook to an earlier (presumably less encumbered) date (using Time Machine) cure the problem until I can install more RAM?
Thanks for your prompt reply! It is a mid-2012 13inch MacbookPro running El Capitan. 2.5 GHz Intel processor, 4 GB RAM (came with 2 GB and was upgraded). The Activity Monitor shows no excessive usage. Would Safe Start help detect the problem?
No doubt this topic has been exhaustively discussed on the forum, but I have one question: can restoring the MacBook to an earlier (presumably less encumbered) date (using Time Machine) cure the problem until I can install more RAM?