Apache web server won't start. org.apache.httpd.plist: Operation already in progress
After upgrading from Mavericks to Yosemite, Apache web server will not run when issuing the command sudo apachectl start. I get the message "org.apache.httpd.plist: Operation already in progress"
I am a web developer and a Mac newbie. No changes have been made to the .conf files. I had upgraded php when I was on Mavericks. The upgrade to PHP 6 was successful. I have created a username.conf file in the /etc/apache2/users folder so that I can create my web sites in my user directory. Again, all of this was working on Mavericks before I upgraded to Yosemite.
Now I just cannot start Apache. Any help would be appreciated.
iMac, OS X Yosemite (10.10), Apache web server