Activating Output Buffering

  1. Start MAMP PRO
  2. Select File -> Edit Template -> PHP 5.x.x php.ini / PHP 5.x.x php.ini
  3. Search this line
    output_buffering = Off
  4. Change Off to On or to a maximum number of bytes instead (for example 4096)
  5. Save the file
  6. Start servers