Batch Downsaving Illustrator CC files to CS6?

You could try this....

https://gist.github.com/joonaspaakko/df2f9e31bdb365a6e5df

// Illustrator convert to legacy.jsx
// https://gist.github.com/joonaspaakko/df2f9e31bdb365a6e5df

// Finds all .ai files from the input folder + its subfolders and converts them to the version given below in a variable called "targetVersion"

// Tested in Illustrator cc 2014 (Mac)
// Didn't bother to do a speed test with my macbook air...

#target illustrator

  // If set to false, a new file will be written next to the original file.
  // The new file will have (legacyFile) in the name.
  // Files with (legacyFile) in the file name are always ignored.
var overwrite = true, // boolean
  // Accepted values:
  // 8, 9, 10, 11 (cs), 12 (cs2), 13 (cs3), 14 (cs4), 15 (cs5), 16 (cs6), 17 (cc)
  targetVersion = 13;

if ( app.documents.length > 0 ) {

  alert("ERROR: \n Close all documents before running this script." );

}
// Run the script
else {

  var files,
  folder = Folder.selectDialog("Input folder...");

  // If folder variable return null, user most likely canceled the dialog or
  // the input folder and it subfolders don't contain any .ai files.
   if ( folder != null ) {

   // returns an array of file paths in the selected folder.
  files = GetFiles( folder );

   // This is where things actually start happening...
  process( files );

   }

}


function process( files ) {

   // Loop through the list of .ai files:
   // Open > Save > Close > LOOP
   for ( i = 0; i < files.length; i++ ) {

   // Current file
  var file = files[i]

   // Open
  app.open( file );

   // If overwrite is false, create a new file, otherwise use "file" variable;
  file = !overwrite ? new File( file.toString().replace(".ai", " (legacyFile).ai") ) : file;

   // Save
  app.activeDocument.saveAs( file, SaveOptions_ai() )

   // Close
  app.activeDocument.close( SaveOptions.DONOTSAVECHANGES );

   }

   // For better of for worse...
  alert( "Script is done." );

}

function SaveOptions_ai() {

  var saveOptions = new IllustratorSaveOptions();

  saveOptions.compatibility = Compatibility[ "ILLUSTRATOR" + targetVersion ];
  saveOptions.flattenOutput = OutputFlattening.PRESERVEAPPEARANCE;
  saveOptions.compressed = true; // Version 10 or later
  saveOptions.pdfCompatible = true; // Version 10 or later
  saveOptions.embedICCProfile = true; // Version 9 or later
  saveOptions.embedLinkedFiles = false; // Version 7 or later

   return saveOptions

}

function GetFiles( folder ) {

  var i, item,
   // Array to store the files in...
  files = [],
   // Get files...
  items = folder.getFiles();

   // Loop through all files in the given folder
   for ( i = 0; i < items.length; i++ ) {

  item = items[i];

   // Find .ai files
  var fileformat = item.name.match(/\.ai$/i),
  legacyFile = item.name.indexOf("(legacyFile)") > 0;

   // If item is a folder, check the folder for files.
   if ( item instanceof Folder ) {

   // Combine existing array with files found in the folder
  files = files.concat( GetFiles( item ) );


   }
   // If the item is a file, push it to the array.
   else if ( item instanceof File && fileformat && !legacyFile ) {

   // Push files to the array
  files.push( item );

   }
   }

   return files;
}

Hi,

I believe that can be done though scripting. I am moving this thread to Illustrator Scripting​ for you and hope we get a helpful response there.

Regards,

Om