Index: build.gradle
===================================================================
diff -u -N -r4e77b06eaad21132a66cdcaf7b13341ebad620aa -rcb0baa98d720c8ba202ec971b44d50f1c6e5fc59
--- build.gradle	(.../build.gradle)	(revision 4e77b06eaad21132a66cdcaf7b13341ebad620aa)
+++ build.gradle	(.../build.gradle)	(revision cb0baa98d720c8ba202ec971b44d50f1c6e5fc59)
@@ -1877,6 +1877,8 @@
     'JALVIEW_APPLICATION_NAME': install4jApplicationName,
     'JALVIEW_DIR': "../..",
     'OSX_KEYSTORE': OSX_KEYSTORE,
+    'OSX_APPLEID': OSX_APPLEID,
+    'OSX_ALTOOLPASS': OSX_ALTOOLPASS,
     'JSIGN_SH': JSIGN_SH,
     'JRE_DIR': getdown_app_dir_java,
     'INSTALLER_TEMPLATE_VERSION': install4jTemplateVersion,
@@ -1929,15 +1931,25 @@
   if (install4j_faster.equals("true") || CHANNEL.startsWith("LOCAL")) {
     faster = true
     disableSigning = true
+    disableNotarization = true
   }
 
   if (OSX_KEYPASS) {
     macKeystorePassword = OSX_KEYPASS
+  } 
+  
+  if (OSX_ALTOOLPASS) {
+    appleIdPassword = OSX_ALTOOLPASS
+    disableNotarization = false
+  } else {
+    disableNotarization = true
   }
 
   doFirst {
     println("Using projectFile "+projectFile)
+    if (!disableNotarization) { println("Will notarize OSX App DMG") }
   }
+  verbose=true
 
   inputs.dir(getdownWebsiteDir)
   inputs.file(install4jConfFile)
Index: utils/install4j/install4j8_template.install4j
===================================================================
diff -u -N -r0b0c6a6a86ca5a69275771c6569e7b41dcd6f8b9 -rcb0baa98d720c8ba202ec971b44d50f1c6e5fc59
--- utils/install4j/install4j8_template.install4j	(.../install4j8_template.install4j)	(revision 0b0c6a6a86ca5a69275771c6569e7b41dcd6f8b9)
+++ utils/install4j/install4j8_template.install4j	(.../install4j8_template.install4j)	(revision cb0baa98d720c8ba202ec971b44d50f1c6e5fc59)
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<install4j version="8.0.8" transformSequenceNumber="8">
+<install4j version="8.0.10" transformSequenceNumber="8">
   <directoryPresets config="../.." />
   <application name="${compiler:JALVIEW_APPLICATION_NAME}" applicationId="${compiler:WINDOWS_APPLICATION_ID}" mediaDir="${compiler:BUILD_DIR}" lzmaCompression="true" shortName="${compiler:INTERNAL_ID}" publisher="University of Dundee" publisherWeb="https://www.jalview.org/" version="${compiler:JALVIEW_VERSION}" allPathsRelative="true" macVolumeId="5aac4968c304f65" javaMinVersion="${compiler:JAVA_MIN_VERSION}" javaMaxVersion="9999999999${compiler:JAVA_MAX_VERSION}" allowBetaVM="true" jdkMode="jdk" jdkName="JDK 11.0">
     <searchSequence>
@@ -13,6 +13,7 @@
       <variable name="JALVIEW_DIR" value="../.." />
       <variable name="BUILD_DIR" value="${compiler:JALVIEW_DIR}/build/install4j" />
       <variable name="OSX_KEYSTORE" />
+      <variable name="OSX_APPLEID" />
       <variable name="JSIGN_SH" value="echo" />
       <variable name="JRE_DIR" value="jre" description="The folder under the app folder that the JRE will be either copied or unpacked into" />
       <variable name="INSTALLER_TEMPLATE_VERSION" value="DEVELOPMENT_default" />
@@ -53,7 +54,27 @@
       <variable name="PNG_ICON_FILE" value="utils/channels/release/images/jalview_logo.png" />
       <variable name="BACKGROUND" value="utils/channels/release/images/jalview_logo_background_fade-640x480.png" />
     </variables>
-    <codeSigning macEnabled="true" macPkcs12File="${compiler:OSX_KEYSTORE}" />
+    <codeSigning macEnabled="true" macPkcs12File="${compiler:OSX_KEYSTORE}" macNotarize="true" appleId="${compiler:OSX_APPLEID}">
+      <macAdditionalBinaries>
+        <entry>*.dylib</entry>
+        <entry>*.so</entry>
+        <entry>*.jnilib</entry>
+        <entry>unpack200</entry>
+        <entry>tnameserv</entry>
+        <entry>servertool</entry>
+        <entry>rmiregistry</entry>
+        <entry>rmid</entry>
+        <entry>policytool</entry>
+        <entry>pack200</entry>
+        <entry>orbd</entry>
+        <entry>keytool</entry>
+        <entry>jjs</entry>
+        <entry>java</entry>
+        <entry>jspawnhelper</entry>
+        <entry>libfreetype.dylib.6</entry>
+        <entry>applet</entry>
+      </macAdditionalBinaries>
+    </codeSigning>
   </application>
   <files defaultUninstallMode="2">
     <filesets>