diff -r f9ec2e76c54c -r c62417f88241 ProjectBuilder.st
--- a/ProjectBuilder.st	Sat Oct 08 23:14:46 2016 +0200
+++ b/ProjectBuilder.st	Sun Oct 09 11:29:12 2016 +0200
@@ -424,7 +424,7 @@
                 dest := packageTargetDir / dllRelativeDestPath.
                 (dest exists not
                  or:[source fileSize ~= dest fileSize
-                 or:[source modificationTime >= dest modificationTime
+                 or:[source modificationTime > dest modificationTime
                  "/ or:[ ((dllSourceDir / dllRelativePath) sameContentsAs:(packageTargetDir / dllRelativePath)) not ]
                 ]]) ifTrue:[
                     Transcript showCR:'updating ',dllRelativeDestPath.
@@ -598,7 +598,7 @@
 copySupportFilesForLinkage
     "copy additional files which are req'd for linkage to the build directory"
 
-    |files|
+    |files fn|
 
     OperatingSystem isMSWINDOWSlike ifTrue:[
         files := #( 
@@ -652,11 +652,22 @@
     files := files asOrderedCollection.
 
     OperatingSystem isMSWINDOWSlike ifTrue:[
-        projectDefinitionClass applicationIconFileName notNil ifTrue:[
-            files add:('projects/smalltalk/',projectDefinitionClass applicationIconFileName,'.ico')
+        (fn := projectDefinitionClass applicationIconFileNameWindows) notNil ifTrue:[
+            fn asFilename suffix isEmptyOrNil ifTrue:[
+                fn := fn,'.ico'
+            ].    
+            files add:('projects/smalltalk/',fn)
         ].
-        projectDefinitionClass splashFileName notNil ifTrue:[
-            files add:('projects/smalltalk/',projectDefinitionClass splashFileName,'.bmp')
+        (fn := projectDefinitionClass splashFileName) notNil ifTrue:[
+            files add:('projects/smalltalk/',fn,'.bmp')
+        ].
+    ].
+    OperatingSystem isOSXlike ifTrue:[
+        (fn := projectDefinitionClass applicationIconFileNameOSX) notNil ifTrue:[
+            fn asFilename suffix isEmptyOrNil ifTrue:[
+                fn := fn,'.icns'
+            ].    
+            files add:('projects/smalltalk/',fn)
         ].
     ].