It’s only 5 years old and is painfully slow. Loading up safari tool all of 4 minutes before I cleared memory. But it’s still slow. It does a lot of rainbow ball twirling whenever I do a command. It improves slightly if an app is already opened but still isn’t great.
I’ve cleared memory and have 100+ GB free now (out of total of 250GB). It’s made a small Difference but still not enough. So I want to clear the whole thing and start again.
Are you logging out and shutting down regularly? I didn't realise that you should and like lots of Mac users, just closed the programmes I was using. I am totally not techie minded but when this started happening, I googled solutions. I don't pretend to understand but apparently, lots of stuff stays in the background, loading and doing goodness only knows. Over time everything gets sluggish. By logging out and shutting down, something magical happens and things get cleaned up. You can also do a safe boot. Check google again for instructions.
I don’t logout no. I restart about once every couple of months, and make sure it logs everything out when it comes straight back, rather than reopen all apps automatically. Does that count or do I have to actually turn it off for 10 minutes or something? I can go days, even a week, without waking it from its sleep.