Problem solved. Restarted mac and Tomcat starts usual.
Bauke, to respond to your post:
Bauke Scholtz wrote:
Shutdown the server which you already started before starting another one from Eclipse.
I will do that if this happens again.
To determine which is running on port 8080, simply open http://localhost:8080 in your webbrowser and explore.
When this problem was on going
http://localhost:8080 in Safari took me to the Tomcat homepage.
Thanks.