diff --git a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/JavaFxLibraryResolver.java b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/JavaFxLibraryResolver.java
index 42c139d..d1917c9 100644
--- a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/JavaFxLibraryResolver.java
+++ b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/JavaFxLibraryResolver.java
@@ -52,7 +52,7 @@
 	public URL getJavadocLocation(IPath libraryPath) {
 		if (isJavaFx(libraryPath)) {
 			/*
-			 * TODO: We don't know if JavaSE-1.9 will ship JavaFX in the ext folder as well. If yes, then we have to use something like
+			 * TODO: We don't know if JavaSE-9 will ship JavaFX in the ext folder as well. If yes, then we have to use something like
 			 * JavaRuntime#getVMInstall(IPath) and IVMInstall2#getJavaVersion() to determine the right Javadoc URL.
 			 */
 			try {
diff --git a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/StandardVMRunner.java b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/StandardVMRunner.java
index 7b696c0..eaa1c40 100644
--- a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/StandardVMRunner.java
+++ b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/StandardVMRunner.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- *  Copyright (c) 2000, 2015 IBM Corporation and others.
+ *  Copyright (c) 2000, 2016 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
@@ -591,9 +591,10 @@
 			// use old single attribute instead of new attributes if not specified
 			bootCP = config.getBootClassPath();
 		}
-		if (prependBootCP != null) {
-			arguments.add("-Xbootclasspath/p:" + convertClassPath(prependBootCP)); //$NON-NLS-1$
-		}
+		// Bug 497945 -Temporary testing to see if we can launch inner eclipse in Mac after this.
+		/*
+		 * if (prependBootCP != null) { arguments.add("-Xbootclasspath/p:" + convertClassPath(prependBootCP)); //$NON-NLS-1$ }
+		 */
 		if (bootCP != null) {
 			if (bootCP.length > 0) {
 				arguments.add("-Xbootclasspath:" + convertClassPath(bootCP)); //$NON-NLS-1$
diff --git a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/StandardVMType.java b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/StandardVMType.java
index fd11dd8..9e52ddd 100644
--- a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/StandardVMType.java
+++ b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/StandardVMType.java
@@ -423,6 +423,18 @@
 			// Add all endorsed libraries - they are first, as they replace
 			allLibs = new ArrayList<LibraryLocation>(gatherAllLibraries(libInfo.getEndorsedDirs()));
 			
+			if (libInfo.getBootpath().length == 0) {
+				// TODO: Bug 489207: Temporary workaround for Jigsaw-previews that don't declare a bootpath.
+				// JDT Core currently requires a non-empty library path, so let's give it jrt-fs.jar as a stand-in for now.
+				// Code referencing org.eclipse.jdt.internal.compiler.util.JimageUtil.JRT_FS_JAR looks for this file.
+				LibraryLocation libraryLocation = new LibraryLocation(
+						new Path(installLocation.getAbsolutePath()).append("jrt-fs.jar"), //$NON-NLS-1$
+							Path.EMPTY, 
+							getDefaultPackageRootPath(), 
+							getDefaultJavadocLocation(installLocation));
+				allLibs.add(libraryLocation);
+			}
+			
 			// next is the boot path libraries
 			String[] bootpath = libInfo.getBootpath();
 			List<LibraryLocation> boot = new ArrayList<LibraryLocation>(bootpath.length);
@@ -762,7 +774,9 @@
 	 */
 	public static URL getDefaultJavadocLocation(String version) {
 		try {
-			if (version.startsWith(JavaCore.VERSION_1_8)) {
+			if (version.startsWith(JavaCore.VERSION_9)) {
+				return new URL("http://download.java.net/java/jdk9/docs/api/"); //$NON-NLS-1$
+			} else if (version.startsWith(JavaCore.VERSION_1_8)) {
 				return new URL("https://docs.oracle.com/javase/8/docs/api/"); //$NON-NLS-1$
 			} else if (version.startsWith(JavaCore.VERSION_1_7)) {
 				return new URL("https://docs.oracle.com/javase/7/docs/api/"); //$NON-NLS-1$
diff --git a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironment.java b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironment.java
index 26f9738..6b0b998 100644
--- a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironment.java
+++ b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironment.java
@@ -1,10 +1,14 @@
 /*******************************************************************************
- *  Copyright (c) 2005, 2015 IBM Corporation and others.
+ *  Copyright (c) 2005, 2016 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
  * 
+ * This is an implementation of an early-draft specification developed under the Java
+ * Community Process (JCP) and is made available for testing and evaluation purposes
+ * only. The code is not compatible with any specification of the JCP.
+ *
  *  Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
@@ -451,6 +455,7 @@
 				if (is != null) {
 					Properties profile = new Properties();
 					profile.load(is);
+					fixJavaSE9ComplianceSourceTargetLevels(profile);
 					return profile;
 				}
 			} catch (IOException e) {
@@ -459,6 +464,20 @@
 		return null;
 	}
 
+
+	/**
+	 * Bug 470616: [1.9] JavaSE-9 Execution Environment should set proper compiler compliance/source/target levels
+	 * <p>
+	 * This is a workaround for Bug 495497: [9] JavaSE-9.profile Execution Environment should set compiler levels to 9
+	 */
+	private void fixJavaSE9ComplianceSourceTargetLevels(Properties profile) {
+		if (ExecutionEnvironmentAnalyzer.JavaSE_9.equals(getId())) {
+			profile.setProperty(JavaCore.COMPILER_COMPLIANCE, JavaCore.VERSION_9);
+			profile.setProperty(JavaCore.COMPILER_SOURCE, JavaCore.VERSION_9);
+			profile.setProperty(JavaCore.COMPILER_CODEGEN_TARGET_PLATFORM, JavaCore.VERSION_9);
+		}
+	}
+
 	/* (non-Javadoc)
 	 * @see org.eclipse.jdt.launching.environments.IExecutionEnvironment#getSubEnvironments()
 	 */
diff --git a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironmentAnalyzer.java b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironmentAnalyzer.java
index f815314..86ee5d3 100644
--- a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironmentAnalyzer.java
+++ b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironmentAnalyzer.java
@@ -1,10 +1,14 @@
 /*******************************************************************************
- * Copyright (c) 2006, 2015 IBM Corporation and others.
+ * Copyright (c) 2006, 2016 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
  *
+ * This is an implementation of an early-draft specification developed under the Java
+ * Community Process (JCP) and is made available for testing and evaluation purposes
+ * only. The code is not compatible with any specification of the JCP.
+ *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
@@ -18,10 +22,8 @@
 
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
-
 import org.eclipse.jdt.internal.launching.EEVMInstall;
 import org.eclipse.jdt.internal.launching.EEVMType;
-
 import org.eclipse.jdt.launching.IVMInstall;
 import org.eclipse.jdt.launching.IVMInstall2;
 import org.eclipse.jdt.launching.IVMInstall3;
@@ -38,6 +40,7 @@
 public class ExecutionEnvironmentAnalyzer implements IExecutionEnvironmentAnalyzerDelegate {
 	
 	// XXX: Note that this string is not yet standardized by OSGi, see http://wiki.osgi.org/wiki/Execution_Environment
+	static final String JavaSE_9 = "JavaSE-9"; //$NON-NLS-1$
 	private static final String JavaSE_1_8 = "JavaSE-1.8"; //$NON-NLS-1$
 
 	private static final String JavaSE_1_7 = "JavaSE-1.7"; //$NON-NLS-1$
@@ -76,6 +79,7 @@
 		mappings.put(JavaSE_1_6, new String[] {J2SE_1_5});
 		mappings.put(JavaSE_1_7, new String[] {JavaSE_1_6});
 		mappings.put(JavaSE_1_8, new String[] { JavaSE_1_7 });
+		mappings.put(JavaSE_9, new String[] { JavaSE_1_8 });
 	}
 	@Override
 	public CompatibleEnvironment[] analyze(IVMInstall vm, IProgressMonitor monitor) throws CoreException {
@@ -101,7 +105,9 @@
 					types = getTypes(CDC_FOUNDATION_1_1);
 				}
 			} else {
-				if (javaVersion.startsWith("1.8")) { //$NON-NLS-1$
+				if (javaVersion.startsWith("9")) { //$NON-NLS-1$
+					types = getTypes(JavaSE_9);
+				} else if (javaVersion.startsWith("1.8")) { //$NON-NLS-1$
 					types = getTypes(JavaSE_1_8);
 				} else if (javaVersion.startsWith("1.7")) { //$NON-NLS-1$
 					types = getTypes(JavaSE_1_7);
diff --git a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/launching/JavaRuntime.java b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/launching/JavaRuntime.java
index 26409e1..508a51c 100644
--- a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/launching/JavaRuntime.java
+++ b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/launching/JavaRuntime.java
@@ -2796,8 +2796,11 @@
             		compliance = JavaCore.VERSION_1_7;
 				} else if (javaVersion.startsWith(JavaCore.VERSION_1_8)) {
 					compliance = JavaCore.VERSION_1_8;
+				} else if (javaVersion.startsWith(JavaCore.VERSION_9)
+						&& (javaVersion.length() == JavaCore.VERSION_9.length() || javaVersion.charAt(JavaCore.VERSION_9.length()) == '.')) {
+					compliance = JavaCore.VERSION_9;
 				} else {
-					compliance = JavaCore.VERSION_1_8; // use latest by default
+					compliance = JavaCore.VERSION_9; // use latest by default
 				}
 
             	Hashtable<String, String> options= JavaCore.getOptions();
diff --git a/org.eclipse.jdt.launching/plugin.properties b/org.eclipse.jdt.launching/plugin.properties
index 5d024d7..792acb3 100644
--- a/org.eclipse.jdt.launching/plugin.properties
+++ b/org.eclipse.jdt.launching/plugin.properties
@@ -1,5 +1,5 @@
 ###############################################################################
-# Copyright (c) 2000, 2014 IBM Corporation and others.
+# Copyright (c) 2000, 2016 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
@@ -58,6 +58,7 @@
 environment.description.9 = Java Platform, Standard Edition 6.0
 environment.description.11 = Java Platform, Standard Edition 7.0
 environment.description.12 = Java Platform, Standard Edition 8.0
+environment.description.13 = Java Platform, Standard Edition 9
 
 classpathVariableInitializer.deprecated = Use the JRE System Library instead
 
diff --git a/org.eclipse.jdt.launching/plugin.xml b/org.eclipse.jdt.launching/plugin.xml
index 81d9bb0..a16e355 100644
--- a/org.eclipse.jdt.launching/plugin.xml
+++ b/org.eclipse.jdt.launching/plugin.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?eclipse version="3.0"?>
 <!--
-     Copyright (c) 2005, 2014 IBM Corporation and others.
+     Copyright (c) 2005, 2016 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
@@ -292,6 +292,11 @@
             description="%environment.description.12"
             id="JavaSE-1.8"
             ruleParticipant="org.eclipse.jdt.internal.launching.environments.DefaultAccessRuleParticipant">
+      </environment>
+      <environment
+            description="%environment.description.13"
+            id="JavaSE-9"
+            ruleParticipant="org.eclipse.jdt.internal.launching.environments.DefaultAccessRuleParticipant">
       </environment>            
       <analyzer
             class="org.eclipse.jdt.internal.launching.environments.ExecutionEnvironmentAnalyzer"