When starting Apache I see this error message:

(48)Address already in use: make_sock: could not bind to address [::]:80
(48)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs

I have attempted to solve this problem with Google only I am finding that others are as stumped as I am. Based on entries in other forums I understand that this error is due to a conflict, most likely caused by having two installations of Apache running simultaneously. I am quite sure that I have disabled 'web sharing' and followed the instructions on this site to the letter (with no errors or problems of any kind).

Can anybody suggest a solution or give me some insight as to where the problem lies?

Thanks in advance for any help you can offer.

Yes, the error is caused by another instance of Apache already running.

You could check with "ps -ax | grep httpd" how many are running.

You could check directly after a reboot if something is starting automatically and also check your launchdeamons scripts for anomalies.