Mac is jammed. Spinning multicolor wheel.....any ideas?
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Sometimes a program will freeze and needs to be forced to quit.  You can do this by going under the black apple and choosing "force quit" from the menu bar.  If that is not allowed you can try using the key command to make it happen.  The force quit key command is:  command+option+esc.  If that does not bring up the force quit menu then you need to restart the computer by holding the power button down for about 7 seconds until the computer shuts off.  Then restart and hopefully the problem will not reoccur.  If it does several times, then there would be a different problem we would need to address.  

It's not uncommon to have a program freeze.