Many update errors are caused by missing or modified files required by Photoshop, typically by a disk cleanup utility (Ex: CleanMyMac, MacKeeper, etc). Make sure you have the latest updates for your clean-up utilities or discontinue use.
Explanations of error codes:
U = Updater.
44 = Install Update Error
M1 = Automatic
M2 = Standalone mode
P = Patcher
6 = Done With Errors
7 = Installation Failed
ISSUE: Installation failed. Error Code: U44M1P7, U44M2P7, U44M1P6
SOLUTION: Run the installer. Reinstall Photoshop CS6 to repair/replace the missing/modified file. Select Help>Updates… to run the updater again. http://helpx.adobe.com/creative-suite/kb/error-u44m1p7-installing-updates-ccm.html
ISSUE: The adobe update 18.104.22.168 errors with code U44M1I210.
SOLUTION: Restart your system, download and install the updates manually. See “Solution 3″ here. http://helpx.adobe.com/creative-suite/kb/error-u44m1i210-installing-updates-ccm.html
To fix the update install problems I've had with CC I use the direct installer I downloaded from Download New Adobe CC Trials: Direct Links (no Assistant/Manager) | ProDesignTools Follow the download instruction to the letter otherwise you will be denied access. Once to have it. Install CC on top of itself. That will back level CC to CC version 14.0. Then use Photoshop menu Help>Updates. All updates should install and all the extensions and addition you made to cc will still be there.