diff --git a/build/build.xml b/build/build.xml
index 5a72e91ab..f4b10486f 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -301,7 +301,7 @@
       <option value="-Dfile.encoding=UTF-8"/>
 
       <option value="-Xms128M"/>
-      <option value="-Xmx1024M"/>
+      <option value="-Xmx512M"/>
 
       <bundledocument extensions="ino,c,cpp,h"
                       icon="macosx/template.app/Contents/Resources/pde.icns"
diff --git a/build/macosx/template.app/Contents/Info.plist b/build/macosx/template.app/Contents/Info.plist
index 55f47f49a..d98100956 100755
--- a/build/macosx/template.app/Contents/Info.plist
+++ b/build/macosx/template.app/Contents/Info.plist
@@ -81,7 +81,7 @@
       <key>VMOptions</key>
       <array>
         <string>-Xms128M</string>
-        <string>-Xmx1024M</string>
+        <string>-Xmx512M</string>
       </array>
 
       <key>MainClass</key>