XAMPP Apache Web Server won't work on mac

   Currently, I join a project, which uses ldap server to manage users. So I want to set a ldap server for myself to test. For the openSource Ldap server, I found there are openLdap and apacheDS.

   As a super fans of apache, of course, I choose the apacheDS as my Ldap server. As Ldap server client, we also have two choices, the first one is Apache Directory Studio, the second one is phpldapadmin, the first one is a eclipse plugIn, the second is phpldapadmin. But the first has issue to add partition. So as a once php programmer, I choosed phpldapadmin as my Ldap client. 

   First, I need to download a tool to run the phpldapadmin, the Xampp is the best choice. I download and install in my mac, unfortunality, when I start the Apache Web Server, it was not working, what happened for it. I confused, so I check xampp website, but found nothing, I checked log, I was not able to find anthing as well. what to result the server can not start up? At last, I found, if I you want to resolve the issue, you need to open your terminal and enter the below command: sudo apachectl stop, that is all. 
    I still do not know the root cause, maybe you guys find, then please contact and tell me, thanks.