title: How to remove installation of MySQL on Mac OS X
body: <p>I need to install older version of mysql server on mac os, but I have a newer version.</p>
  
  <p>I tried to remove this newer installation (5.1), but when start old version install (5.0b) message "MySQL 5.0.51b-community for Mac OS X can't be installed in this disk. A newer version of this software alrady exists on this disk".</p>
  
  <p>I can't recognize problem, because I remove all data of previouse install, but installer says no.</p>
  
  <p>Mac OS version 10.6.</p>