I have a MacBook Pro (I think mid 2012). About three months ago it started running really slow, so I renstalled the OS with a recovery partition. For a few weeks it ran very well with an overall very seamless experience.
Yet, as of two days ago, suddenly it started running extremely slow again. When I use
vim and save a 200 line text file it takes about a minute average. When I want to click an icon or menu bar, it's not unusual to delay even highlighting the widget for 30 seconds.
I thought it might be the hard disk drive, so today I changed to a brand new SSD. This, however, had no effect.
The computer runs at this very slow speed even when system monitor says that there are 1.5GB RAM left and 97% idle CPU.
Does anyone know what the issue might be?
Right now I’m trying to run the recovery partition again, yet even booting from it has already taken me longer than writing this.
I have only used about 30 GB of my startup disk.
I am not aware of any malware, yet, I canot be sure.
I have 4 GB of RAM (DDR3 1600MHz)
CPU is i5 2.5 Ghz
I got it into recovery mode, and even here it's painfully slow, even if I select a disk i disk utility, it takes quite some time to even highlight the name. Could a reinstall even do the trick here?
More clear details
MacBook Pro 13" (mid 2012)
CPU: 2.5 GHz i5
RAM: 4 GB 1600MHz DDR3
Graphics: Intel 4000
Disk: 500GB (now 120GB) Only 30 GB when running slowly.
OS: Mavericks, it came with Mountain Lion (It has run well with Mavericks)
As suggested I tried to replace the Hard Drive cable following this post.
The cost of this was the cable itself (around 32 EUR), and was done with only PH0 and PH00 screwdrivers.
It's been working perfectly for around 30 minutes with no sign of the prior slowdown. The repair was very easy and the effect is just as one could wish for.