My MacBook is not shutting down

I have a MacBook Yosemite that is locked first because Preview is locked. I tried to make a Force Close. It does not drop out of that list of active processed and the machine will not shot down. I tried to open Safari and Mail but each shuts down immediately.

What can I do to force it closed?

Thanks.
newbiewebSr. Software EngineerAsked:
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JohnBusiness Consultant (Owner)Commented:
For a Lenovo laptop, I just hold the power button down until it goes off.

Here is what I found for MAC.

https://support.apple.com/en-ca/HT201236

For the power button (part way down) "Hold for 1.5 seconds while your Mac is awake to display a dialog asking if you want to restart, sleep, or shut down.  Hold for 5 seconds to force your Mac to turn off. "

Here is another (somewhat different) set of instructions.

http://www.wikihow.com/Force-Shut-Down-a-Mac
strungCommented:
You can always hold down the power button for 5 seconds to shut down. When you reboot, boot holding down the shift key so that Preview doesn't automatically load.
newbiewebSr. Software EngineerAuthor Commented:
I know how to do a hard restart, but I would rather solve this problem and shut down  the machine gracefully.

Any ideas?
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strungCommented:
Try opening Activity Monitor and see if you can quit preview that way.
newbiewebSr. Software EngineerAuthor Commented:
i tried Force Quit from Activity Monitor but no success. I removed it from the list on Activity Monitor but the Force Quit window shows it's still there...
JohnBusiness Consultant (Owner)Commented:
You get to a point with Windows, and apparently MAC where all you can do is force it off. I have even forced a server off as there was no alternative (I waited long enough and zero damage done).

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newbiewebSr. Software EngineerAuthor Commented:
Yes, I finally gave in and did the old "three finger salute", except I just used my index finger on the power button.
JohnBusiness Consultant (Owner)Commented:
@newbieweb - Thanks. Sometimes, that is what we have to do.
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