Removed the "all files are refs" error message and made the "no files, can't scan" message quicker. That's because when scanning iPhoto libraries with big libraries, the GUI would hang because these checks would involve loading the whole library.

core_pe/app_cocoa.py

@@ -122,6 +122,15 @@ class Directories(directories.Directories):
         else:
             directories.Directories.add_path(self, path)
     
+    def has_any_file(self):
+        # If we don't do that, it causes a hangup in the GUI when we click Start Scanning because
+        # checking if there's any file to scan involves reading the whole library. If we have the
+        # iPhoto library, we assume we have at least one file.
+        if any(path == Path('iPhoto Library') for path in self._dirs):
+            return True
+        else:
+            return directories.Directories.has_any_file(self)
+    
 
 class DupeGuruPE(app_cocoa.DupeGuru):
     def __init__(self):