PS. From what I see on https://github.com/3-manifolds/Sage_macOS/issues/28
I gather you might try to remove (or better, rename, to be on the safe
side) the folders

  ~/Library/Application Support/SageMath/*/Jupyter

in other to be able to start Jupyter again.




On Tue, Apr 23, 2024 at 10:57 PM Dima Pasechnik <dimp...@gmail.com> wrote:
>
> On Tue, Apr 23, 2024 at 10:29 PM S Benton <brentons...@gmail.com> wrote:
>
> > We are not using the app.  She downloaded SageMath-10.3_arm64.dmg from 
> > github., double clicked the executable and followed the installation 
> > instructions. To launch, she clicks the SageMath-10-3 icon along the bottom 
> > of her mac. This gives her the option to open Jupyter Notebook, which she 
> > does, using the SageMath kernel.
>
> OK. What macOS version do you run?
> Do you have all the updates installed ? (you should)
>
> >
> > She has a 3 year old mac and I'm wondering if it just doesn't have the 
> > processing power it needs to do these more intensive mathematical 
> > computations. (plus she probably has other stuff up on her computer) So 
> > when Jupyter Lab konks out, she is unable to restart it. Even if she 
> > reboots her computer, when she tries to relaunch from the SageMath icon, 
> > she gets the Local host Error connection refused. She looks in Activity 
> > Monitor and says she has killed all of the python processes, but still 
> > cannot launch SageMath.
>
> it's most probably a stale "lock" file, just a file created by a
> process to indicate that it's running; such a file is cleaned on a
> normal exit,
> but not in case of a crash.
>
> I must say I don't know much about this app, I'll cc to one of the authors.
>
> Marc, could you have a look?
>
> The app has a dedicated issue tracker:
> https://github.com/3-manifolds/Sage_macOS/issues
> it might be better to report there.
>
> >
> > The last time this happened we removed and then reinstalled SageMath. But 
> > that's a tough way to keep things moving. I'm wondering if when Jupyter Lab 
> > dies, if there are files that live on and make it so that she cannot 
> > relaunch. We have not been able to find, or just lack the skills to find, 
> > where any of these files might be located. I tried to run "jupyter" 
> > commands from the terminal, but they come back as unknown and searching 
> > through "finder" on the mac is not getting us anywhere.
> >
> > Short of buying a new computer or continuing to reinstall SageMath, I'm 
> > wondering if there is a simpler of way of getting things up and running 
> > again for her.
> >
> Certainly a 3 y.o. machine is more than enough to run Sage, it's some
> kind of software glitch, I suppose.
> I'm running Sage (and writing this email from a 7 y.o. machine just fine).
>
> A quick way to run Sage is to use https://cocalc.com
> (you can upload Jupyter notebooks there to run; you can even use it for free,
> but to make it run better you'd need to pay something like $7 per month)
>
> There are several other ways to run Sage locally on your mac,
> but let's try things in turn first.
>
> Hope this helps,
> Dima
>
> > Thank you so much for responding. It is deeply appreciated.
> >
> >
> >
> > On Tuesday, April 23, 2024 at 4:05:17 PM UTC-4 Dima Pasechnik wrote:
> >>
> >> Hi,
> >>
> >> please tell us more about the Sage version, and how you installed it, and 
> >> how you launch the notebook.
> >>
> >> Do you use the Sagemath macOS app?
> >>
> >>
> >> Dima
> >>
> >>
> >> On 23 April 2024 20:05:12 BST, S Benton <brent...@gmail.com> wrote:
> >>>
> >>> Hi - at my wit's end here - my daughter is trying to use Sage Math 
> >>> Jupyter Notebook for her college coursework. She has had problems where 
> >>> if Notebook crashes, she is unable to relaunch it - she gets a 
> >>> "connection refused" error and it mentions Local Host 8888. Last time, we 
> >>> reinstalled everything and she was able to get up and running again. 
> >>> However, this keeps happening.
> >>>
> >>> I am wondering if - when Notebook crashes - if there are still processes 
> >>> running out there that are preventing her from relaunching a new instance 
> >>> of Notebook. She is on a mac, and I'm trying to find the commands or 
> >>> directories where these processes or files might stored so that I can 
> >>> remove them.
> >>>
> >>> I am not able to use any of the "Jupyter" commands from the mac command 
> >>> line to see what is running. Does anyone have any help they can offer on 
> >>> why this might be happening and how i can get her up and running again?
> >>>
> >>> Many thanks
> >
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