diff --git a/src/download-mac.html b/src/download-mac.html
index 50f858b7..e00e0ac7 100755
--- a/src/download-mac.html
+++ b/src/download-mac.html
@@ -8,13 +8,25 @@ <h1 class="narrow">Download Binaries for Apple Mac OSX</h1>
 
  <div class="txt narrow">
   These binaries are for OS X version 10.4 and higher.
+  Nearly everyone will have an Intel-based computer chip, so
+  unless you know otherwise, click on intel after choosing a mirror below.
   Usually the binary for a version or two before yours should work, e.g. 10.7 should work on 10.8.
-  For more information <a href="http://files.sagemath.org/osx/README.txt">read the installation instructions</a>.
+  For more information <a href="https://doc.sagemath.org/html/en/installation/binary.html#macos">read the installation instructions</a>.
  </div>
 
 <div class="narrow txt small round large" style="background: #faa; padding: 15px;">
     <div style=" font-size: 110%; font-weight: bold;">
-        On OS X version 10.11 (El Capitan),
+        On OS X version 10.15 (Catalina) or above,
+        there are some difficulties with binary installation
+        regarding Mac security.  See 
+        <a href="https://ask.sagemath.org/question/49572/sage-90-installation-issues-on-macos-10152-catalina/?answer=51650#post-id-51650">these 
+        instructions for more information.</a>
+    </div>
+</div>
+
+<div class="narrow txt small round large" style="background: #faa; padding: 15px;">
+    <div style=" font-size: 110%; font-weight: bold;">
+        On OS X version 10.11 (El Capitan) and above,
         you need at least sage-6.10.
         It does not work with older versions of {{ sage }}.
     </div>