Packaged macOS app unable to launch server

Hi,

I followed the instructions in the README to build the electron app, which I can launch no problem from the command line using npm run build:all. I also packaged the app into an osx .app using npm run dist, and moved the app contained in the resulting dist/JupyterLab.dmg into /Applications. When I run the packaged app, I only get the screen

Jupyter Server Not Found

We were unable to launch a Jupyter server, which is a prerequisite for JupyterLab Native. If Jupyter is already installed, but it is not in your PATH, specify its location below. Otherwise, try installing or updating Jupyter. The Jupyter notebook version must be 4.3.0 or greater.

CHOOSE PATH | INSTALL JUPYTER

Jupyter is definitely on my path:

$ which jupyter 
/Users/{username}/anaconda/bin/jupyter

I’ve pointed the app at every reasonable binary in /Users/{username}/anaconda/bin but with no success.

My versions are

jupyter==1.0.0
jupyter-client==5.2.2
jupyter-console==5.2.0
jupyter-core==4.4.0
jupyterlab==0.31.8
jupyterlab-launcher==0.10.5
notebook==5.4.0

and I’m on macOS version 10.12.6 (16G1212).

[declanvk]

Hello @JohnPaton, If you’re running on OSX there is the possibility that your environment variables, namely $PATH and by extension your jupyter and python executables, are not being updated on the start of the application. PR #150 should hopefully provide a solution.

[declanvk]

@JohnPaton Anytime! Closing, but if you need to, please re-open at any point.