That seems to have done the trick. I can quit safari and Cookie empties the cache without any problem.
The chown command changed
[email protected] 1 ronaldgold admin 47 Feb 7 2016 clearCookies.sh
[email protected] 1 ronaldgold admin 119 Nov 18 08:04 clearSafariCache.sh
[email protected] 1 ronaldgold admin 159 Feb 7 2016 clearSafariHistory.sh
to
[email protected] 1 ronaldgold staff 47 Nov 18 08:04 clearCookies.sh
[email protected] 1 ronaldgold staff 119 Nov 18 08:04 clearSafariCache.sh
[email protected] 1 ronaldgold staff 159 Nov 18 08:04 clearSafariHistory.sh