MBP 13 inch Mid 2012
i5, 4gb ram
I was handed this MBP to fix the slowness the user experienced using any app. I confirmed its slow, horrible slow. beachball shows anytime you click anything. It can take 10 minutes to open finder and another 3 or 4 before the next pane populates. After some time looking at activity monitor and seeing nothing beyond 2% CPU and next to no disk usage, I gave up trying to locate an app related problem and started to believe it was a drive failure hidden from the disk utility tests. The only things fixed are a couple groups that are 80 should be 0 and 244 should be 0.
Tried disk utility and it ran for 20+ hours repairing permissions then ran again for 6 hours repairing the drive, both times reporting nothing wrong. I'm running it again repairing permissions and it has ben saying 8 minutes then 9 minutes for over 2 hours. This is typical of how this machine behaves.
Just for fun I put a new drive in in the middle of this and booted using CMD-R with the intention of starting over to see if that made it any faster. I have used this method to replace a drive before but on this machine it behaved just as slowly as it does doing anything else. Since this method is derived from the system board and not from a disk, this is leading me to believe that the problem here is deeper than an app of a drive and appears related to something on the system board.
I would appreciate some insight on what to try next. I would hate to turn it over to apple for service, that just means defeat.:)