My 2012 MacBook Pro 13' just suddenly started running at a snails pace?

Question

I got my MacBook about a year ago and it has run well the entire time but for some reason yesterday it started to run very slowly. It doesn't have to do with the Wi-Fi because I've been several different places and the programs will start they just take a very long time to do so. Does anyone know what could be the problem. Do I need to reset the system or something? When I listen to it run it sounds like it's running in bursts, could it be a fan issue? Whatever it is, it's freaking me out, I need my computer. Thanks for all of the help!

Answer 1

Back up all data immediately as your boot drive may be failing.
If you have more than one user account, these instructions must be carried out as an administrator.
Triple-click anywhere in the line below on this page to select it:
syslog -k Sender kernel -k Message CReq 'Chann|GPU D|I/O' | tail | open -ef
Copy the selected text to the Clipboard (command-C).
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V).
The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
A TextEdit window will open with the output of the command. Normally the window will be empty. If you get output like this:
kernel[0] <Debug>: disk0s2: I/O error
the boot drive is failing, or there's some other hardware fault in the storage subsystem.
If you get output like any of this:
kernel[0] <Debug>: ** GPU Debug Info Start **
kernel[0] <Debug>: ** GPU Debug Info End **
kernel[0] <Debug>: NVDA(Private): Channel timeout!
kernel[0] <Debug>: NVDA(OpenGL): Channel timeout!
there's a fault in the graphics processor or logic board. The two kinds of output are not mutually exclusive, but if you get both, a logic-board fault is likely.