Learn how to AppleScript, Apple's built in automation platform. Use this under utilized handler to run cleanup or maintenance statements when your script is told to quit. I'll show you an example of how it works so you can implement it in your own code.
For more AppleScript tutorial videos, check out this play list.
https://youtube.com/playlist?list=PL5iB9WEZe2j04doUAKVxqxaCv3JJ8TxQr
If you're interested in watching full scripts being written, have a look at this play list.
https://youtube.com/playlist?list=PL5iB9WEZe2j2UIcvjAPVDNMU7oCuCb5eJ
