problem solved
Solution that worked for me:
Question:
Do you have the app Transmit installed? Delete the _MASReceipt folder embedded in it.
Answer (yes)
well i cant find this folder _MASReceipt anywhere on my mac even when showing hidden folders ! anyone for holding my hand ?
Solution
Right-click on Transmit and click "show package contents".
I just found out that deleting the folder may render Transmit inoperable, so make a back up of it before you delete the MASReceipt folder.
Problem solved