Macbook Pro incredibly slow/laggy I have a Mid-2012 15" MacBook Pro running OS X (Yosemite) 10.10.2. It has a 2.6GHz Intel Core i7, 8 GB of RAM, and a 750GB HDD.

Over the past couple of weeks it has become incredibly slow, to the point that simple actions such as clicking on an icon in the dock have caused the spinning wheel to appear. As far as I can tell nothing significant changed around the time that this behaviour started.

There is nothing unusual shown in Activity Monitor: CPU usage is low and there is over 6 GB of free memory with no swap being used.

Some example of the degree of slowness are:


Scrolling down the page on an already loaded page in Chrome - Spinning wheel for 30 seconds
Clicking in text field on Github in Chrome - Nothing happens for 34 seconds
Refreshing a page in Opera - Spinning wheel for 27 seconds
Opening Calendar from the dock - 70 seconds for Calendar to open, no visual feedback
Clicking to focus open Pages document - Nothing happens for 21 seconds
Opening System Preferences and clicking Keyboard - Spinning wheel for 30 seconds
Clicking on the File menu in Finder - Spinning wheel for 23 seconds
Swiping up with three fingers on the trackpad (show Mission Control) - Nothing happens for 12 seconds
Moving cursor down a single line in vim - Spinning wheel for 12 seconds


I have tried the following:


Turning it off and on again
Making sure everything is up-to-date
Performing a disk repair
Resetting the SMC
Resetting the PRAM


Is there anything else I can try to fix this?

Edit: Unbelievably enough I somehow didn't think to check the logs. Doing so shows the following message occurring regularly. Does this mean that my hard disk is damaged, despite the fact that the disk repair claimed to have fixed any issues?

kernel: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (C9D97BC3-3A2E-405E-BE14-0E9B3FAD7A0D), pv 90103BF0-50B3-455D-947E-A020BC46F680, near LV byte offset = 161931108352.
kernel: disk1: I/O error.
Don't waste even a second because your HDD is for sure suffering from a few bad sectors. I had the same problem, after two days of dealing with a very slow Mac, it failed to boot and I had to regenerate bad sectors of HDD using software available on the market. Really time consuming and risky procedure in case your data on HDD is important.