Similar crash here, early-2011 macbook pro 8,2 (Radeon 6750M) on 10.6.7.
debug.log finishes at:
GetAvailableDevices(): Found 1 devices on platform 'Apple' (index 0)
Printing info for device index 0 Vendor: AMD Device: ATI Radeon HD 6750M
CL_DEVICE_VENDOR: AMD
CL_DEVICE_NAME: ATI Radeon HD 6750M
CL_DRIVER_VERSION: 1.0
CL_DEVICE_TYPE: CL_DEVICE_TYPE_GPU
CL_DEVICE_MAX_COMPUTE_UNITS: 5
CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS: 3
CL_DEVICE_MAX_WORK_ITEM_SIZES: 1024 / 1024 / 1024
CL_DEVICE_MAX_WORK_GROUP_SIZE: 1024
CL_DEVICE_MAX_CLOCK_FREQUENCY: 150 MHz
CL_DEVICE_ADDRESS_BITS: 32
CL_DEVICE_IMAGE_SUPPORT: 0
CL_DEVICE_MAX_READ_IMAGE_ARGS: 0
CL_DEVICE_MAX_WRITE_IMAGE_ARGS: 0
CL_DEVICE_IMAGE_MAX_WIDTH: 2d width 8192, 2d height 8192, 3d width 0, 3d height 0, 3d depth 0
CL_DEVICE_MAX_MEM_ALLOC_SIZE: 128 MByte
CL_DEVICE_GLOBAL_MEM_SIZE: 512 MByte
CL_DEVICE_ERROR_CORRECTION_SUPPORT: no
CL_DEVICE_LOCAL_MEM_TYPE: local
CL_DEVICE_LOCAL_MEM_SIZE: 32 KByte
CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE: 64 KByte
CL_DEVICE_QUEUE_PROPERTIES: CL_QUEUE_PROFILING_ENABLE
CL_DEVICE_EXTENSIONS:
CL_DEVICE_PREFERRED_VECTOR_WIDTH: char 16, short 8, int 4, long 2, float 4, double 0
Preparing device... (ATI Radeon HD 6750M (AMD))Preparing device... is always followed by a crash, in libSystem.B.dylib - full crashlog is at
http://pastebin.com/ALfPv6PD