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Date: Sat, 1 Jun 2013 20:30:16 -0700
From: Martin Leon <martin@...turestogether.com>
To: john-dev@...ts.openwall.com
Subject: OS X Macbook problems trying to use GPU

I have tried both building both macosx-x86-64-opencl and macosx-x86-64-cuda builds of JtR to no avail.  I did this with the latest 'bleeding jumbo' code base

Both versions build but they each have a different problem.

The macosx-x86-64-opencl just hangs cold as soon as I try to use an '-opencl' format (e.g. --forma=wpapsk-opencl).  The system stops responding completely.  I have to power the machine down using the power button.

The macosx-x86-64-cuda build tells me I don't have a CUDA compatible device.

Has anyone successfully built a GPU-enabled JtR on a system like this?  I don't particularly care whether it's CUDA or OpenCL, I just would like to take advantage of my GPU if possible.

I am running on a MacBook Pro with the following details from System Information:

17-inch, Early 2011

Graphics  AMD Radeon HD 6750M 1024 MB

Software  Mac OS X Lion 10.7.5 (11G63)

AMD Radeon HD 6750M:

  Chipset Model:	AMD Radeon HD 6750M
  Type:	GPU
  Bus:	PCIe
  PCIe Lane Width:	x8
  VRAM (Total):	1024 MB
  Vendor:	ATI (0x1002)
  Device ID:	0x6741
  Revision ID:	0x0000
  ROM Revision:	113-C0170L-573
  gMux Version:	1.9.24
  EFI Driver Version:	01.00.573
  Displays:
Color LCD:
  Display Type:	LCD
  Resolution:	1920 x 1200
  Pixel Depth:	32-Bit Color (ARGB8888)
  Main Display:	Yes
  Mirror:	Off
  Online:	Yes
  Built-In:	Yes
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