I have no sound after upgrading to Yosemite

Ok so after I installed Yosemite and rebooted I no longer have any sound.. I found an article that someone posted stating the same thing happened to them... The fix online was to go to the Sound utility in your system preferences and select "Built-In" under the Output to: However, I do not have an option for Built-in
I am using iMac (27-inch, Mid 2011)
3.4 i7 Intel Core Processor
8GB Ram DDR3
Sound: Built-in by Apple 44100
Any help would be greatly appreciated

Check out my post I spent 15 hours fixing it when my iPad 2 on iOS 6.1.3 volume disappeared.
https://discussions.apple.com/thread/5075175

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I did open my iPhoto library in Aperture after the most recent update. Could that have done any damage?

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Hey wow, thats really nice. Already bookmarked it. :)
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Sounds like Notifications app.
Maybe some other app. In SystemPreferences->Users&Groups->LoginItems tab: remove all entries with the minus sign underneath. This will not uninstall anything, you have to start those apps by hand now. Restart.
Still there?
Yes: Restart again while holding the shift key, this will start the mac in SafeMode: only the necessary items are loaded to run.
Still there?
Yes: Make an etrecheck list and post it here.
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Hi qhaine,
Thanks for the question. After reviewing your post, it sounds like you are having trouble hearing sound from the iMac speakers. I would recommend that you read this article, it may be able to help you resolve or isolate the issue.
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After upgrading to Yosemite, Sound driver suddenly stopped working as you see in the image.

There are many possible causes for this issue. Take each of the following steps that you haven't already tried. Some may not apply to your model. Back up all data before making any changes.
1. Start with the steps recommended in this support article. Don't skip any of the steps. It's the starting point for further efforts to solve the problem.
2. Run Software Update and make sure you have a fully up-to-date installation of OS X.
3. If you've installed an application called "Memory Clean" or any other third-party software that is supposed to "clean" or "purge" memory automatically, remove it according to the developer's instructions and restart. You should do that even if the software is not causing the problem, because it's useless.
4. Other third-party software that has been reported to interfere with sound output includes "Boom" and "Samsung Kies." If applicable, uninstall according to the developer's instructions (not by dragging something to the Trash.)
5. If an AirPlay device is selected for sound output from iTunes (or from other applications via third-party software such as "Airfoil"), deselect it.
6. Launch the application "Audio MIDI Setup" by entering the first few letters of its name in a Spotlight search and selecting it in the results (it should be at the top.) Select Built-in Output from the list on the left. If the Mute boxes are checked, uncheck them.
7. If a red light is visible in the audio-out port when sound should be playing, the internal switch is stuck in the position for digital output. You may be able to free it by inserting and removing a mini-stereo jack of the proper size. Inserting any kind of tool in the port may cause damage that won't be covered by the warranty.
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8. Disconnect all wired peripherals except keyboard and mouse, if applicable. If more than one display is connected, disconnect all extra ones. Restart and test.
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Sorry,
Yes, the error message is exactly like that ("Database error: failured to persist version")
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