Question: I downloaded SageMath-9.2 on my mac, but every time I try to use the notebook by running "sage -n jupyter" on my terminal I get the following massage: Please wait while the Sage Jupyter Notebook server starts... Traceback (most recent call last): File "/Applications/SageMath-9.2.app/Contents/Resources/sage/local/lib/python3.8/site-packages/sage/repl/ipython_kernel/install.py", line 307, in have_prerequisites from notebook.notebookapp import NotebookApp File "/Applications/SageMath-9.2.app/Contents/Resources/sage/local/lib/python3.8/site-packages/notebook/notebookapp.py", line 66, in from tornado import httpserver File "/Applications/SageMath-9.2.app/Contents/Resources/sage/local/lib/python3.8/site-packages/tornado/httpserver.py", line 29, in import ssl File "/Applications/SageMath-9.2.app/Contents/Resources/sage/local/lib/python3.8/ssl.py", line 98, in import _ssl # if we can't import it, let the error propagate ModuleNotFoundError: No module named '_ssl' The Jupyter notebook requires ssl, even if you do not use https. Install the openssl development packages in your system and then rebuild Python (sage -f python3).  And also I can't open the app either for some reason ..... every time I click on the app I get a small window saying : Jupyter Server failed to start For some reason the Jupyter server failed to start. Please check the log for clues, and have that information handy when asking for help.  I hope for some help, its very important for me because I must use SageMath for my college project.. thanks in advance

Answer: On macOS Big Sur, there are several ways to install SageMath  using Conda: https://doc.sagemath.org/html/en/installation/conda.html building from source, using as many Homebrew packages as you can: https://doc.sagemath.org/html/en/installation/source.html using CoCalc-Docker: https://github.com/sagemathinc/cocalc-docker  Sage can also be used online using  Binder  https://sage-package.readthedocs.io/en/latest/sage_package/thebe.html https://opendreamkit.org/2018/07/23/live-online-slides-with-sagemath-jupyter-rise-binder/ https://github.com/sagemath/sage-binder-env   CoCalc: https://cocalc.com SageCell: https://sagecell.sagemath.org  The installation you currently have was downloaded as a macOS app, which ships its own Python which lacks the SSL module (for licence reasons). To repair it:  change to the Sage directory optionally get the latest development version set number of jobs to run in parallel get rid of that Sage's Python configure optionally follow the brew install recommendations at the end of configure make  $ DIR=/Applications/SageMath-9.2.app/Contents/Resources/sage $ cd $DIR $ git checkout develop $ git pull origin develop --tags $ MAKE='make -j8' $ V=0 $ source .homebrew-build-env $ make -s V=0 python3-clean $ make -s V=0 configure $ ./configure $ make -s V=0  The other way to solve your problem is to use the SageMath Jupyter kernel provided by Sage with your system-wide Jupyter (eg as installed via Homebrew). This should achieve that goal: $ SAGE_LOCAL=`sage -c 'print(SAGE_LOCAL)'` $ SAGE_KERNEL=$SAGE_LOCAL/share/jupyter/kernels/sagemath $ KERNELS=$HOME/Library/Jupyter/kernels $ ln -s $SAGE_KERNEL $KERNELS