diff --git a/docs/nmap-install.xml b/docs/nmap-install.xml
index 85a4cc465..8f6ddd6ab 100644
--- a/docs/nmap-install.xml
+++ b/docs/nmap-install.xml
@@ -1032,9 +1032,9 @@ the trash.</para></listitem>
 <para>See the instructions in <xref linkend="inst-macosx-exec"/> for
 help on running Nmap and Zenmap after they are installed.</para>
 
-<para>The programs installed by the installer are universal binaries
-that will run on Mac OS X 10.4 (Tiger) or later. Users of earlier versions will
-have to compile from source or use a third-party package.</para>
+<para>The programs installed by the installer will run on Mac OS X 10.5
+(Leopard) or later. Users of earlier versions will have to compile from
+source or use a third-party package.</para>
 </sect2>
 
 <sect2 id="inst-macosx-source">
diff --git a/macosx/README b/macosx/README
index bf61e7e0b..9a4accdc1 100644
--- a/macosx/README
+++ b/macosx/README
@@ -1,6 +1,6 @@
 Nmap is a free and open source utility for network exploration and security auditing. Zenmap is a multi-platform graphical frontend and results viewer for Nmap. Ncat is a general-purpose network sending and receiving utility, a reimplementation of Netcat. Ndiff is a an Nmap scan comparison utility. Nping is a tool for packet generation and sending.
 
-This package contains Nmap, Zenmap, Ncat, Ndiff, and Nping. It is intended to work on Intel and PowerPC Macs running Mac OS X 10.4 or later.
+This package contains Nmap, Zenmap, Ncat, Ndiff, and Nping. It is intended to work on Intel Macs running Mac OS X 10.5 or later.
 
 Installation of all packages is optional. Unselect Zenmap to get just the command-line tool. Unselect Nmap if you prefer to use a copy of Nmap that is already installed. Zenmap will not work without Nmap.