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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