Anaconda Jupyter Notebook Opencv not working
Try the following:

Install OpenCV using Anaconda Navigator or via terminal by running:
conda install -c conda-forge opencv
Now you should check if its installed by running this in terminal: conda list
Import OpenCV in Jupyter Notebook: In your Jupyter Notebook, run import cv2 and see if it works.
If the above steps are not working, you should add OpenCV to your Python PATH by writing the following code to your Jupyter NB:
import sys
sys.path.append('/anaconda3/lib/python3.7/site-packages')

This should work.
Ok so to preface this, I am very new to jupyter notebook and anaconda. Anyways I need to download opencv to use in my notebook but every time I download I keep getting a NameError saying that ‘cv2’ is not defined.
I have uninstalled and installed opencv many times and in many different ways and I keep getting the same error. I saw on another post that open cv is not in my python path or something like that…
How do I fix this issue and put open cv in the path? (I use Mac btw) Please help :( Thank you!