Posts by [CSF] David Bainbridge
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1) Message boards : Macintosh : Mac hanging with GPU selected on Collatz Conjecture (Message 24327)
Posted 107 days ago by [CSF] David Bainbridge
No I did not clear it up! I have now updated to High Sierra and the problem persists. I can run CPU tasks OK, and especially in safe more where the machine will happily run for days. However in safe more the GPU is disabled, or seems to be so Collatz reports GPU missing.

As you say running it with everything else closed down seems to work more reliably.
2) Message boards : Macintosh : Mac hanging with GPU selected on Collatz Conjecture (Message 23658)
Posted 391 days ago by [CSF] David Bainbridge
Hi all,

Running MacOS 10.12.2 Sierra

on this hardware:
Model Name: iMac
Model Identifier: iMac16,2
Processor Name: Intel Core i5
Processor Speed: 3.1 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 4 MB
Memory: 16 GB

Graohic: Intel Iris Pro Graphics 6200
VRAM (Dynamic, Max): 1536 MB

I have had a problem with the machine locking up so I have been trouble shooting and everything seems to pint to the Collatz Conjecture application when running on the GPU.

Starting in safe mode makes the GPU un-findable and the problem disappears.

The lock-up requires a hard reboot.

Anyone else experienced this? Anyone have any other solutions that would allow me to continue to run Collatz using the GPU?

Many thanks

3) Message boards : News : SSL Certificate Replace (again) (Message 23314)
Posted 440 days ago by [CSF] David Bainbridge
Thanks everyone! Really appreciate all the effort that goes into this project. Thanks to everyone who posted on the message boards too. I had nothing to add but it was great to see the transparency. Anyway, I'm crunching again ...

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