My Mac keeps stalling

Question

As previously stated my mac keeps stalling out, I will open iTunes (for example) and it will be unresponsive for a couple moments then the colorful ball will appear and after a few minutes of that it will either fail or be sporadic and continue to not work properly until it does fail and close out. As a side note I have recently started using the software Virtual DJ and am suspecting it may be a RAM issue? I've had the program downloaded (everything was fine) for a while but I just recently picked it up again and now I can't get either my iTunes or VDJ to work correctly 8 out of 10 times. Help and tips would be greatly appreciated, please and thanks.
PS. Safari and all other applications seem to be working just fine, its just my music applications that seem to be the problem. I also have 1T of memory on here so memory space should not be a problem either.

Answer 1

When you have the problem, note the exact time: hour, minute, second.  
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console 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 and start typing the name.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.
Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.