Remove application from App Store's Update section I've got an application in my Updates list which I never installed. It doesn't appear under Purchases nor Hidden Purchases. I can't hide it by right-clicking on it. When I click "Update" it asks me for some different Apple ID I've never heard of.

How can I get rid of the update showing up?
I had the exact same problem and this solved it:


  All app downloaded from Mac AppStore(MAS) contain a receipt inside
  their app bundle (example: appname.app/Contents/_MASReceipt/receipt).
  MAS will scan this file to check whether the new version is available.
  
  You can use this application (Find Any File) to search any receipt on
  your drive: http://apps.tempel.org/FindAnyFile/
  
  
  Launch 'Find Any File' and search for: _MASReceipt 
  Go through each result that you think could be the culprit, copy the receipt to your desktop as a backup, and after that delete the
  receipt inside
  _MASReceipt folder. 
  Open MAS and let it scan for software update. If it's still showing the wrong ID, it means that you've deleted the wrong receipt.
  Restore the receipt backup from your desktop to it's previous
  location. 
  Repeat the process until you've found the problem receipt.