Why does gpuArray() error out?

What does the error mean?

>> A = gpuArray( rand(1024) ); 
There is a problem with the graphics driver or with this GPU
device. Be sure that you have a supported GPU and that the latest
driver is installed.

Caused by:
    The CUDA driver could not be loaded. The library name used was
    '/usr/local/cuda/lib/libcuda.dylib'. The error was:
    dlopen(/usr/local/cuda/lib/libcuda.dylib, 10): image not found
 
>> 

[Jackson Burns]

I would reccomend updating/re-installing your graphics driver to see if that solves the problem.

[madhan ravi]

Will do that and see if it works, thanks.

Answer 1

[Joss Knight]

Make sure you have read this: https://uk.mathworks.com/matlabcentral/answers/442324-can-i-use-matlab-with-an-nvidia-gpu-on-macos-10-14-mojave

[madhan ravi]

Indeed thank you for the link Joss, I'm currently on version 10.12.6 , let me try if upgrading to mojave 10.13 works out.

[Joss Knight]

Crikey, that's the opposite of my point. Upgrading to Mojave (which is 10.14 not 10.13) will prevent you ever using your card for computation in MATLAB. If you are still on Sierra then great, the only issue is downloading a valid driver: https://www.nvidia.com/en-us/drivers/cuda/mac-driver-archive/

You may of course have to upgrade your OS to High Sierra (10.13) if you have a more recent version of MATLAB since it will demand a driver with a certain minimum version.

[madhan ravi]

Oops! So just to be clear , I use 2018b , .

Could you recommend a suitable valid driver from the above link?

[Joss Knight]

18b is on CUDA 9.2, and there doesn't appear to be a MacOS 10.12-compatible driver that supports CUDA 9.2. You'll need to downgrade MATLAB or upgrade your OS.

[madhan ravi]

Thank you, Joss. I see in the above link that versions of the drivers are 9.0.197, 9.0.214 9.0.222. so any of the three would suffice , right?

[Joss Knight]

No, because you have MATLAB R2018b, which requires a driver that supports CUDA 9.2. You can do worse than try every driver and look for one that works. But, as I said, you will probably have to either upgrade your OS to 10.13 or get an earlier version of MATLAB.

The version compatibility issues between MATLAB and MacOS are just an artifact of the restrictions on NVIDIA driver version/MacOS compatibility and affect any application attempting to use the GPU for computation, not just MATLAB.

[madhan ravi]

Thanks, Joss. Will do as suggested.

[madhan ravi]

I have upgraded to 10.13.6 but with no success. In case if it helps:

MATLAB Version: 9.5.0.944444 (R2018b)
MATLAB License Number: XXXXXXX
Operating System: Mac OS X  Version: 10.13.6 Build: 17G65 
Java Version: Java 1.8.0_152-b16 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode

Intel HD Graphics 4000:

Chipset Model:	Intel HD Graphics 4000
  Type:	GPU
  Bus:	Built-In
  VRAM (Dynamic, Max):	1536 MB
  Vendor:	Intel
  Device ID:	0x0166
  Revision ID:	0x0009
  Metal:	Supported, feature set macOS GPUFamily1 v3

[Walter Roberson]

? Only NVIDIA GPUs are supported, not even one Intel GPU.

[Joss Knight]

Yes. Do you not actually have an NVIDIA GPU?

[madhan ravi]

No, as pasted in the comment above all I have is just Intel HD Graphics 4000. So no way to use GPU in MATLAB?

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/369336-support-for-egpu-via-tb3-on-macos-systems

https://www.mathworks.com/matlabcentral/answers/395934-gpu-programming-on-matlab-mac-window-what-are-my-options

Note: eGPU on Mac only officially supports some AMD Radeon .

However: Your MacPro mid 2012 13" appears to be model MacBookPro9,2 with 1280 by 800 resolution internal. That model has two USB3.0 connectors, and a Firewire 800 connector, and a Thunderbolt 1 connector. You would therefore not be able to use any of the external GPUs that need Thunderbolt 3 connectors.

I happen to have the very next model up, the mid 2012 15.4 inch, which I took the upgraded display resolution on. It has a GeForce GT 650M as well as HD 4000. However, I effectively do not use that system now; the memory limitations (8 Gb) were getting tiresome, and the hard drive started to whine.

[madhan ravi]

Thank you , sir Walter.