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Psychopy internal error

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.