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Why no OpenCL output on iMac OS X Lion?

• To: mathgroup at smc.vnet.net
• Subject: [mg125206] Why no OpenCL output on iMac OS X Lion?
• From: Murray Eisenberg <murray at math.umass.edu>
• Date: Wed, 29 Feb 2012 07:21:48 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• Reply-to: murray at math.umass.edu

I'm running Mathematica 8.0.4 on the latest, 2011 iMac (3.4 GHz Core i7, 
16 GB RAM) under OS X Lion (10.7.3). The graphics adapter is an AMD 
Radeon HD 6970M (2048 MB VRAM).

After loading OpneCLLink, OpenCLQ[] returns True.

Yet evaluating examples from the ref page for OpenCLFractalRender3D 
returns nothing. E.g., OpenCLFractalRender3D[].

Moreover, it seems as if the OpenCL link is being closed, or the package 
unloaded, immediately after I try such an evaluation -- because if I 
evaluate it again, now I get the input expression itself returned; and 
indeed the $ContextPath no longer includes OpenCLLink (or the SymboliC 
and CCompilerDriver automatically added by loading OpenCLLink).

What could be wrong?

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305