I would like to restore my 9 year old MacBookPro6,2 to its former glory. And to get rid of anything that might be slowing it down. I have original discs. Do I have to go down that path to original OS or is there a way to restore it to some intermediary OS online?
Once I do that can I update it straight to High Sierra (highest OS that my configuration supports) or do I have to go through all the updates one by one?