# Psychopy internal error

**URL:** <https://discourse.psychopy.org/t/psychopy-internal-error/18324>\
**Category:** Builder\
**Created:** [November 21, 2020, 12:57pm UTC](https://discourse.psychopy.org/t/psychopy-internal-error/18324 "2020-11-21T12:57:07Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![SimAmanda](https://avatars.discourse-cdn.com/v4/letter/s/46a35a/32.png) [@SimAmanda](https://discourse.psychopy.org/u/SimAmanda)\
**Post date:** [November 21, 2020, 12:57pm UTC](https://discourse.psychopy.org/t/psychopy-internal-error/18324/1 "2020-11-21T12:57:07Z")

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Hi.

I am trying to set up a basic experiment, it is my first time using psychopy. I have currently added just a text to my experiment but when I go to run it this comes up:  
Generating PsychoPy script…

############# Running: /Users/casasim/Documents/trial \_lastrun.py ##############  
397.4238 INFO Loaded monitor calibration from [‘2020\_11\_14 09:22’]  
0.4161 WARNING We strongly recommend you activate the PTB sound engine in PsychoPy prefs as the preferred audio engine. Its timing is vastly superior. Your prefs are currently set to use [‘sounddevice’, ‘PTB’, ‘pyo’, ‘pygame’] (in that order).  
Traceback (most recent call last):  
File “/Users/casasim/Documents/trial \_lastrun.py”, line 18, in   
from psychopy import sound, gui, visual, core, data, event, logging, clock  
File “/Applications/PsychoPy.app/Contents/Resources/lib/python3.6/psychopy/gui/ **init**.py”, line 45, in   
from .qtgui import \*  
File “/Applications/PsychoPy.app/Contents/Resources/lib/python3.6/psychopy/gui/qtgui.py”, line 35, in   
from PyQt5 import QtWidgets  
ImportError: dlopen(/Applications/PsychoPy.app/Contents/Resources/lib/python3.6/lib-dynload/sip.so, 2): no suitable image found. Did find:  
/Applications/PsychoPy.app/Contents/Resources/lib/python3.6/lib-dynload/sip.so: code signature invalid for ‘/Applications/PsychoPy.app/Contents/Resources/lib/python3.6/lib-dynload/sip.so’

##### Experiment ended.

Do you know what might be happening/what i am doing wrong?  
I do have quite an old macbook: yosemite 10.10.5  
Thank you in advance.