Is there's way to live disc of mac on an usb or to partially reset an mac to default drivers or perform the equivalent of doing a system refresh without reinstalling an mac?
To give some context, my wife owns an older MacBook Pro (2014), and recently it has started acting out. We can summarize the acting out as: everything feels sluggish, opening and closing applications comes to a crawl, and that installing updates don't work at seemingly undefined times. Sometimes when it comes out of standby allegedly it's fast again. The most recent discovery my wife made is that it strongly seems to be affected by Wi-FI (for example switching to mobile hotspot).
Because of the nature of the symptoms at first I thought could be an hardware related failure. So first thing I checked out the memory and ssd. However running memtest, and checking the S.M.A.R.T. status reported no issues. Following that we attempted apple diagnostics, which also reported no failures.
So at this point I'm quite puzzled what else I can investigate and I'm wondering what the best bets are. In particular. I'm wondering if there's way to refresh drivers or go to fresher install to rule out any software related issues.
If anybody has some pointers or tips I would greatly appreciate that.