diff --git a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/MachO.java b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/MachO.java
index b8da4e5e94f..1866e757f87 100644
--- a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/MachO.java
+++ b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/MachO.java
@@ -26,6 +26,11 @@ import org.eclipse.cdt.utils.CPPFilt;
 import org.eclipse.cdt.utils.debug.stabs.StabsReader;
 
 // test checkin
+/**
+ * @deprecated. Deprecated as of CDT 6.1. Use 64 bit version {@link MachO64}.
+ * This class is planned for removal in next major release.
+ */
+@Deprecated
 public class MachO {
 	protected ERandomAccessFile efile;		
 
diff --git a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/MachOHelper.java b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/MachOHelper.java
index 895a88e22f5..b7c045f2cdc 100644
--- a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/MachOHelper.java
+++ b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/MachOHelper.java
@@ -20,11 +20,15 @@ import org.eclipse.cdt.utils.macho.MachO.Section;
 import org.eclipse.cdt.utils.macho.MachO.Symbol;
 
 /**
+ * @deprecated. Deprecated as of CDT 6.1. Use 64 bit version {@link MachOHelper64}.
+ * This class is planned for removal in next major release.
+ * <br>
  *  <code>MachOHelper</code> is a wrapper class for the <code>MachO</code> class
  *  to provide higher level API for sorting/searching the MachO data.
  *
  *  @see MachO
  */
+@Deprecated
 public class MachOHelper {
 
 	private MachO macho;
diff --git a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryArchive.java b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryArchive.java
index 51f08a7b0ae..a404f979198 100644
--- a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryArchive.java
+++ b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryArchive.java
@@ -22,7 +22,10 @@ import org.eclipse.cdt.utils.macho.AR;
 import org.eclipse.core.runtime.IPath;
 
 /**
+ * @deprecated. Deprecated as of CDT 6.1. Use 64 bit version {@link MachOBinaryArchive64}.
+ * This class is planned for removal in next major release.
  */
+@Deprecated
 public class MachOBinaryArchive extends BinaryFile implements IBinaryArchive {
 
 	ArrayList<IBinaryObject> children;
diff --git a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryExecutable.java b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryExecutable.java
index 0972171070d..24adfc32fbc 100644
--- a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryExecutable.java
+++ b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryExecutable.java
@@ -16,6 +16,11 @@ import org.eclipse.cdt.core.IBinaryParser.IBinaryFile;
 import org.eclipse.core.runtime.IPath;
 
 
+/**
+ * @deprecated. Deprecated as of CDT 6.1. Use 64 bit version {@link MachOBinaryExecutable64}.
+ * This class is planned for removal in next major release.
+ */
+@Deprecated
 public class MachOBinaryExecutable extends MachOBinaryObject implements IBinaryExecutable {
 
 	public MachOBinaryExecutable(IBinaryParser parser, IPath path) {
diff --git a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryObject.java b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryObject.java
index dcb9671912c..ae3963b7577 100644
--- a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryObject.java
+++ b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryObject.java
@@ -36,9 +36,11 @@ import org.eclipse.cdt.utils.macho.MachOHelper;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.Path;
 
-/*
- * MachOBinaryObject 
+/**
+ * @deprecated. Deprecated as of CDT 6.1. Use 64 bit version {@link MachOBinaryObject64}.
+ * This class is planned for removal in next major release.
  */
+@Deprecated
 public class MachOBinaryObject extends BinaryObjectAdapter {
 
 	protected AR.ARHeader header;
diff --git a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryShared.java b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryShared.java
index 96dcbe9df7b..463dcddd56f 100644
--- a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryShared.java
+++ b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOBinaryShared.java
@@ -16,6 +16,11 @@ import org.eclipse.cdt.core.IBinaryParser.IBinaryShared;
 import org.eclipse.core.runtime.IPath;
 
 
+/**
+ * @deprecated. Deprecated as of CDT 6.1. Use 64 bit version {@link MachOBinaryShared64}.
+ * This class is planned for removal in next major release.
+ */
+@Deprecated
 public class MachOBinaryShared extends MachOBinaryObject implements IBinaryShared {
 
 	protected MachOBinaryShared(IBinaryParser parser, IPath path) {
diff --git a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOParser.java b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOParser.java
index f99d86cc9e9..94f9bbda5cc 100644
--- a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOParser.java
+++ b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/macho/parser/MachOParser.java
@@ -24,7 +24,10 @@ import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.Path;
 
 /**
+ * @deprecated. Deprecated as of CDT 6.1. Use 64 bit version {@link MachOParser64}.
+ * This class is planned for removal in next major release.
  */
+@Deprecated
 public class MachOParser extends AbstractCExtension implements IBinaryParser {
 
 	/* (non-Javadoc)