Use system image.

Author: dkocher

osx/src/main/java/ch/cyberduck/ui/cocoa/controller/BookmarkController.java

@@ -282,12 +282,12 @@ public Boolean run() {
                         @Override
                         public void cleanup() {
                             alertIcon.setEnabled(!reachable);
-                            alertIcon.setImage(reachable ? null : IconCacheFactory.<NSImage>get().iconNamed("alert.tiff"));
+                            alertIcon.setImage(reachable ? null : IconCacheFactory.<NSImage>get().iconNamed("NSCaution"));
                         }
                     });
                 }
                 else {
-                    alertIcon.setImage(IconCacheFactory.<NSImage>get().iconNamed("alert.tiff"));
+                    alertIcon.setImage(IconCacheFactory.<NSImage>get().iconNamed("NSCaution"));
                     alertIcon.setEnabled(false);
                 }
             }

osx/src/main/java/ch/cyberduck/ui/cocoa/datasource/TransferPromptDataSource.java

@@ -187,7 +187,7 @@ protected NSObject objectValueForItem(final TransferItem file, final String iden
         if(identifier.equals(Column.warning.name())) {
             if(file.remote.isFile()) {
                 if(status.getLength() == 0) {
-                    return IconCacheFactory.<NSImage>get().iconNamed("alert.tiff");
+                    return IconCacheFactory.<NSImage>get().iconNamed("NSCaution");
                 }
             }
             return null;