Repository: spyder-ide/spyder

Issue:
Opening preferences results in UnboundLocalError in macOS app
## Description

### What steps will reproduce the problem?

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1. Download latest macOS app artifact.
2. Run Spyder
3. Open Preferences


### Traceback
```python-traceback
Traceback (most recent call last):
  File "/Users/rclary/Applications/spyder-dev/Spyder-16490.app/Contents/Resources/lib/python3.9/spyder/plugins/preferences/plugin.py", line 276, in <lambda>
    lambda: self.open_dialog(main.prefs_dialog_size))
  File "/Users/rclary/Applications/spyder-dev/Spyder-16490.app/Contents/Resources/lib/python3.9/spyder/plugins/preferences/plugin.py", line 256, in open_dialog
    container.create_dialog(
  File "/Users/rclary/Applications/spyder-dev/Spyder-16490.app/Contents/Resources/lib/python3.9/spyder/plugins/preferences/widgets/container.py", line 63, in create_dialog
    page.initialize()
  File "/Users/rclary/Applications/spyder-dev/Spyder-16490.app/Contents/Resources/lib/python3.9/spyder/plugins/preferences/api.py", line 80, in initialize
    self.setup_page()
  File "/Users/rclary/Applications/spyder-dev/Spyder-16490.app/Contents/Resources/lib/python3.9/spyder/plugins/application/confpage.py", line 229, in setup_page
    interface_group, macOS_group)
UnboundLocalError: local variable 'macOS_group' referenced before assignment
```

## Versions

* Spyder version: 5.4.0.dev0 1e21b4029 (standalone)
* Python version: 3.9.5 64-bit
* Qt version: 5.15.2
* PyQt5 version: 5.15.7
* Operating System: Darwin 20.6.0

### Dependencies

```
# Mandatory:
atomicwrites >=1.2.0                 :  1.4.0 (OK)
chardet >=2.0.0                      :  5.0.0 (OK)
cloudpickle >=0.5.0                  :  2.1.0 (OK)
cookiecutter >=1.6.0                 :  2.1.1 (OK)
diff_match_patch >=20181111          :  20200713 (OK)
intervaltree >=3.0.2                 :  3.1.0 (OK)
IPython >=7.31.1;<8.0.0              :  7.34.0 (OK)
jedi >=0.17.2;<0.19.0                :  0.18.1 (OK)
jellyfish >=0.7                      :  0.9.0 (OK)
jsonschema >=3.2.0                   :  4.6.1 (OK)
keyring >=17.0.0                     :  23.6.0 (OK)
nbconvert >=4.0                      :  6.5.0 (OK)
numpydoc >=0.6.0                     :  1.4.0 (OK)
parso >=0.7.0;<0.9.0                 :  0.8.3 (OK)
pexpect >=4.4.0                      :  4.8.0 (OK)
pickleshare >=0.4                    :  0.7.5 (OK)
psutil >=5.3                         :  5.9.1 (OK)
pygments >=2.0                       :  2.12.0 (OK)
pylint >=2.5.0;<3.0                  :  2.14.4 (OK)
pyls_spyder >=0.4.0                  :  0.4.0 (OK)
pylsp >=1.4.1;<1.5.0                 :  1.4.1 (OK)
pylsp_black >=1.2.0                  :  1.2.1 (OK)
qdarkstyle >=3.0.2;<3.1.0            :  3.0.3 (OK)
qstylizer >=0.1.10                   :  0.2.1 (OK)
qtawesome >=1.0.2                    :  1.1.1 (OK)
qtconsole >=5.3.0;<5.4.0             :  5.4.0.dev0 (OK)
qtpy >=2.1.0                         :  2.1.0 (OK)
rtree >=0.9.7                        :  1.0.0 (OK)
setuptools >=49.6.0                  :  63.1.0 (OK)
sphinx >=0.6.6                       :  5.0.2 (OK)
spyder_kernels >=2.3.1;<2.4.0        :  2.4.0.dev0 (OK)
textdistance >=4.2.0                 :  4.3.0 (OK)
three_merge >=0.1.1                  :  0.1.1 (OK)
watchdog >=0.10.3                    :  2.1.9 (OK)
zmq >=22.1.0                         :  23.2.0 (OK)

# Optional:
cython >=0.21                        :  0.29.30 (OK)
matplotlib >=3.0.0                   :  3.5.2 (OK)
numpy >=1.7                          :  1.22.4 (OK)
pandas >=1.1.1                       :  1.4.3 (OK)
scipy >=0.17.0                       :  1.8.1 (OK)
sympy >=0.7.3                        :  1.10.1 (OK)

# Spyder plugins:
spyder_terminal.terminalplugin 1.2.2 :  1.2.2 (OK)
```



Discussion:
The error was introduced by #18485. This was a mistake on my part. 

Resolving patch:
diff --git a/spyder/plugins/application/confpage.py b/spyder/plugins/application/confpage.py
--- a/spyder/plugins/application/confpage.py
+++ b/spyder/plugins/application/confpage.py
@@ -224,7 +224,7 @@ def set_open_file(state):
 
         screen_resolution_layout.addLayout(screen_resolution_inner_layout)
         screen_resolution_group.setLayout(screen_resolution_layout)
-        if sys.platform == "darwin":
+        if sys.platform == "darwin" and not running_in_mac_app():
             interface_tab = self.create_tab(screen_resolution_group,
                                             interface_group, macOS_group)
         else:


Test patch: