Currently Being ModeratedJun 21, 2013 5:52 AM (in response to Joshuawilson22)
The spinning color wheel indicates the machine is doing something. You can use your keyboard to force quit, the force quit keyboard command is Command - Option - Esc. Choose the offending item and force quit it.
Currently Being ModeratedJun 21, 2013 7:37 AM (in response to Joshuawilson22)
I have found that the keyboard shortcut to force quit a running application doesn't always work. If not you can access force quit from the Apple menu. If you can't get to the Finder to Force Quit a particular application, then just hold the power button in for about 5 seconds to force the computer to shut down. Then do a safe boot - start up with Shift key held down until progress bar appears.Check to see if you have at least 15% free space on your hard drive, also run permissions repair on hard drive using Disk Utility. If the problem persists try reinstalling from Tim Machine backup. If the computer is overheating, clean out as much dust as possible. See iFixit for guides on how to open the machine. Be very careful not to touch printed circuit boards and other components which can be damaged by static discharge. Do not be tempted by MacKeeper. This seems to be helpful in the short term, but in the longer term causes problems and is quite tricky to completely remove from your computer. As they say the Mac OS should maintain itself, without any external help.
Currently Being ModeratedJun 21, 2013 8:01 AM (in response to violinsocial_worker)
A forced shutdown by holding down the power button is a very last resort option and is potentially damaging to the OS. Therefore it is poor advice and should not be followed.