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The osx x86_64 swt jar as available in the Eclipse 4.6 (Neon) release for OSX. It is suitable for use with jface and other dependencies available from maven central in the org.eclipse.scout.sdk.deps group. The sources is copied from swt-4.6-cocoa-macosx-x86_64.zip from http://download.eclipse.org/eclipse/downloads/drops4/R-4.6-201606061100/ and javadoc is generated from sources.

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/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.dnd;

import org.eclipse.swt.internal.cocoa.*;

/**
 * The class HTMLTransfer provides a platform specific mechanism
 * for converting text in HTML format represented as a java String
 * to a platform specific representation of the data and vice versa.
 *
 * An example of a java String containing HTML text is shown
 * below:
 *
 *  *     String htmlData = "This is a paragraph of text.";
 * 
 *
 * @see Transfer
 */
public class HTMLTransfer extends ByteArrayTransfer {

	static HTMLTransfer _instance = new HTMLTransfer();
	static final String HTML = OS.NSHTMLPboardType.getString();
	static final int HTMLID = registerType(HTML);

HTMLTransfer() {}

/**
 * Returns the singleton instance of the HTMLTransfer class.
 *
 * @return the singleton instance of the HTMLTransfer class
 */
public static HTMLTransfer getInstance () {
	return _instance;
}

/**
 * This implementation of javaToNative converts HTML-formatted text
 * represented by a java String to a platform specific representation.
 *
 * @param object a java String containing HTML text
 * @param transferData an empty TransferData object that will
 *  	be filled in on return with the platform specific format of the data
 *
 * @see Transfer#nativeToJava
 */
@Override
public void javaToNative (Object object, TransferData transferData){
	if (!checkHTML(object) || !isSupportedType(transferData)) {
		DND.error(DND.ERROR_INVALID_DATA);
	}
	transferData.data = NSString.stringWith((String) object);
}

/**
 * This implementation of nativeToJava converts a platform specific
 * representation of HTML text to a java String.
 *
 * @param transferData the platform specific representation of the data to be converted
 * @return a java String containing HTML text if the conversion was successful;
 * 		otherwise null
 *
 * @see Transfer#javaToNative
 */
@Override
public Object nativeToJava(TransferData transferData){
	if (!isSupportedType(transferData) || transferData.data == null) return null;
	NSString string = (NSString) transferData.data;
	return string.getString();
}

@Override
protected int[] getTypeIds() {
	return new int[] {HTMLID};
}

@Override
protected String[] getTypeNames() {
	return new String[] {HTML};
}

boolean checkHTML(Object object) {
	return (object != null && object instanceof String && ((String)object).length() > 0);
}

@Override
protected boolean validate(Object object) {
	return checkHTML(object);
}
}