diff --git a/build.xml b/build.xml
index 0cbba328..add65ce7 100644
--- a/build.xml
+++ b/build.xml
@@ -23,7 +23,10 @@
     </condition>
 
     <condition property="is.java6">
-        <equals arg1="${ant.java.version}" arg2="1.6"/>
+        <or>
+            <equals arg1="${ant.java.version}" arg2="1.6"/>
+            <equals arg1="${ant.java.version}" arg2="1.7"/>
+        </or>
     </condition>
 
     <target name="check-java6" unless="is.java6">
@@ -111,6 +114,9 @@
         <!-- prepare hide from dock option -->
         <replaceregexp file="dist/DavMail.app/Contents/Info.plist" match="&lt;key>CFBundleName&lt;/key>"
                        replace="&lt;key>LSUIElement&lt;/key>&lt;string>0&lt;/string>&lt;key>CFBundleName&lt;/key>"/>
+        <!-- Retina display support -->
+        <replaceregexp file="dist/DavMail.app/Contents/Info.plist" match="&lt;key>CFBundleName&lt;/key>"
+                       replace="&lt;key>NSHighResolutionCapable&lt;/key>&lt;true/>&lt;key>CFBundleName&lt;/key>"/>
         <zip file="dist/DavMail-MacOSX-${release}.app.zip">
             <zipfileset dir="dist">
                 <include name="DavMail.app/**/*"/>