diff --git a/CHANGELOG b/CHANGELOG
index c3f8ebb..21ee6c8 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,6 @@
-v 0.4.0 [22-nov-2019]
+v 0.4.0 [10-mar-2020]
     - Update easymacro.py
+    - Fix: in OSx Catalina
 
 
 v 0.3.0 [12-nov-2019]
diff --git a/easymacro.py b/easymacro.py
index 5a85ccd..30ea714 100644
--- a/easymacro.py
+++ b/easymacro.py
@@ -4178,7 +4178,26 @@ def get_path_python():
         path = join(path, '..', 'Resources', PYTHON)
     else:
         path = join(path, PYTHON)
-    return path
+
+    cmd = '"{}" -V'.format(path)
+    if run(cmd, True):
+        return path
+
+    path = PYTHON
+    cmd = '"{}" -V'.format(path)
+    result = run(cmd, True)
+
+    if 'Python 3' in result:
+        return path
+
+    path = PYTHON + '3'
+    cmd = '"{}" -V'.format(path)
+    result = run(cmd, True)
+
+    if 'Python 3' in result:
+        return path
+
+    return ''
 
 
 # ~ Export ok
@@ -4542,8 +4561,8 @@ def run(command, wait=False):
                 stdout=None, stderr=None, close_fds=True)
             result, er = p.communicate()
     except subprocess.CalledProcessError as e:
-        msg = ("run [ERROR]: output = %s, error code = %s\n"
-            % (e.output, e.returncode))
+        msg = ("%s\nrun [ERROR]: output = %s, error code = %s\n"
+            % (command, e.output, e.returncode))
         error(msg)
         return False
 
diff --git a/files/ZAZPip_v0.4.0.oxt b/files/ZAZPip_v0.4.0.oxt
index 009cf99..6617a17 100644
Binary files a/files/ZAZPip_v0.4.0.oxt and b/files/ZAZPip_v0.4.0.oxt differ
diff --git a/source/ZAZPip.py b/source/ZAZPip.py
index f83f068..2d1d0f2 100644
--- a/source/ZAZPip.py
+++ b/source/ZAZPip.py
@@ -32,8 +32,6 @@ class Controllers(object):
 
     def __init__(self, dialog):
         self.d = dialog
-        # ~ self.path_python = app.PYTHON
-        # ~ if app.IS_WIN:
         self.path_python = app.get_path_python()
         self._states = {
             'list': False,
@@ -248,13 +246,11 @@ class Controllers(object):
             cmd = '"{}"'.format(self.path_python)
             app.open_file(cmd)
         else:
-            if app.DESKTOP == 'gnome':
+            cmd = 'exec "{}"'
+            if app.IS_MAC:
+                cmd = 'open "{}"'
+            elif app.DESKTOP == 'gnome':
                 cmd = 'gnome-terminal -- {}'
-            else:
-                if app.IS_MAC:
-                    cmd = 'open "{}"'
-                else:
-                    cmd = 'exec "{}"'
 
             cmd = cmd.format(self.path_python)
             app.run(cmd)
@@ -282,10 +278,11 @@ class ZAZPip(unohelper.Base, XJobExecutor):
         dialog.id_extension = ID_EXTENSION
         dialog.events = Controllers(dialog)
 
+        lbl_title = '{} {} - {}'.format(app.NAME, app.VERSION, app.OS)
         args = {
             'Type': 'Label',
             'Name': 'lbl_title',
-            'Label': app.NAME + ' v' + app.VERSION,
+            'Label': lbl_title,
             'Width': 100,
             'Height': 15,
             'Border': 1,
@@ -297,11 +294,7 @@ class ZAZPip(unohelper.Base, XJobExecutor):
         dialog.add_control(args)
         dialog.center(dialog.lbl_title, y=5)
 
-        # ~ path_python = app.PYTHON
-        # ~ if app.IS_WIN:
         path_python = app.get_path_python()
-        # ~ cmd = app.PYTHON + ' -V'
-        # ~ if app.IS_WIN:
         cmd = '"{}" -V'.format(path_python)
         label = app.run(cmd, True)
 
diff --git a/source/pythonpath/easymacro.py b/source/pythonpath/easymacro.py
index 5a85ccd..30ea714 100644
--- a/source/pythonpath/easymacro.py
+++ b/source/pythonpath/easymacro.py
@@ -4178,7 +4178,26 @@ def get_path_python():
         path = join(path, '..', 'Resources', PYTHON)
     else:
         path = join(path, PYTHON)
-    return path
+
+    cmd = '"{}" -V'.format(path)
+    if run(cmd, True):
+        return path
+
+    path = PYTHON
+    cmd = '"{}" -V'.format(path)
+    result = run(cmd, True)
+
+    if 'Python 3' in result:
+        return path
+
+    path = PYTHON + '3'
+    cmd = '"{}" -V'.format(path)
+    result = run(cmd, True)
+
+    if 'Python 3' in result:
+        return path
+
+    return ''
 
 
 # ~ Export ok
@@ -4542,8 +4561,8 @@ def run(command, wait=False):
                 stdout=None, stderr=None, close_fds=True)
             result, er = p.communicate()
     except subprocess.CalledProcessError as e:
-        msg = ("run [ERROR]: output = %s, error code = %s\n"
-            % (e.output, e.returncode))
+        msg = ("%s\nrun [ERROR]: output = %s, error code = %s\n"
+            % (command, e.output, e.returncode))
         error(msg)
         return False