diff --git a/doc/src/sgml/dfunc.sgml b/doc/src/sgml/dfunc.sgml
index bc29fb18cb0..9fd3511b4db 100644
--- a/doc/src/sgml/dfunc.sgml
+++ b/doc/src/sgml/dfunc.sgml
@@ -154,8 +154,8 @@ cc -shared -o foo.so foo.o
    </varlistentry>
 
    <varlistentry>
-    <term><systemitem class="osname">MacOS X</></term>
-    <indexterm><primary>MacOS X</><secondary>shared library</></>
+    <term><systemitem class="osname">Mac OS X</></term>
+    <indexterm><primary>Mac OS X</><secondary>shared library</></>
     <listitem>
      <para>
       Here is an example.  It assumes the developer tools are installed.
diff --git a/doc/src/sgml/release-old.sgml b/doc/src/sgml/release-old.sgml
index f03683ec3fd..7b74947af4e 100644
--- a/doc/src/sgml/release-old.sgml
+++ b/doc/src/sgml/release-old.sgml
@@ -3299,7 +3299,7 @@ New BeOS port (David Reid, Cyril Velter)
 Add proofreader's changes to docs (Addison-Wesley, Bruce)
 New Alpha spinlock code (Adriaan Joubert, Compaq)
 UnixWare port overhaul (Peter E)
-New Darwin/MacOS X port (Peter Bierman, Bruce Hartzler)
+New Darwin/Mac OS X port (Peter Bierman, Bruce Hartzler)
 New FreeBSD Alpha port (Alfred)
 Overhaul shared memory segments (Tom)
 Add IBM S/390 support (Neale Ferguson)
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index 8f85df64da4..5098aad130a 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -945,8 +945,8 @@ options        SEMMAP=256
 
 
      <varlistentry>
-      <term><systemitem class="osname">MacOS X</></term>
-      <indexterm><primary>MacOS X</><secondary>IPC configuration</></>
+      <term><systemitem class="osname">Mac OS X</></term>
+      <indexterm><primary>Mac OS X</><secondary>IPC configuration</></>
       <listitem>
        <para>
         The recommended method for configuring shared memory in OS X