CW3 has stopped working on my macbook

[QueenStromba]

It worked fine for over a week and last night half way through a map the screen went white with a strobing effect and I had to force quit. Now when I try to run it I get the same white screen with strobing and almost crashes my computer. I've tried rebooting, deleting the game and opening a new copy from the zip file and turning my computer off for nearly an hour since Virgil thought it might be a GPU problem. I've also run a system diagnostic with the following results:

Test run on October 13, 2013
Mac OS X 10.6.8

Intel Intel Core i7 running at 2800 MHz

NVIDIA NVIDIA GeForce GT 330M GPU

8192 MB System RAM (Score: 160)
- RAM Speed: 4885 MB/s

CPU Tests (Score: 456)
- Floating Point Operations/Second: 153369264
- Integer Operations/Second: 285322976
- MD5 Hashes Generated/Second: 1044120

Graphics Tests (Score: 119)
- 3D Frames Per Second: 329

Hardware Tests (Score: 18)
- Primary Partition Capacity: 465 GB
- Drive Write Speed: 57 MB/s


The contents of the Unity log are:

Initialize engine version: 4.2.0f4 (38efbd14869d)
GfxDevice: creating device client; threaded=1
OpenGL:
    Version:  OpenGL 2.1 [2.1 NVIDIA-1.6.36]
    Renderer: NVIDIA GeForce GT 330M OpenGL Engine
    Vendor:   NVIDIA Corporation
    VRAM:     512 MB
    Extensions: GL_ARB_transpose_matrix GL_ARB_vertex_program GL_ARB_vertex_blend GL_ARB_window_pos GL_ARB_shader_objects GL_ARB_vertex_shader GL_ARB_shading_language_100 GL_EXT_multi_draw_arrays GL_EXT_clip_volume_hint GL_EXT_rescale_normal GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_gpu_program_parameters GL_EXT_geometry_shader4 GL_EXT_transform_feedback GL_APPLE_client_storage GL_APPLE_specular_vector GL_APPLE_transform_hint GL_APPLE_packed_pixels GL_APPLE_fence GL_APPLE_vertex_array_object GL_APPLE_vertex_program_evaluators GL_APPLE_element_array GL_APPLE_flush_render GL_APPLE_aux_depth_stencil GL_NV_texgen_reflection GL_NV_light_max_exponent GL_IBM_rasterpos_clip GL_SGIS_generate_mipmap GL_ARB_imaging GL_ARB_point_parameters GL_ARB_texture_env_crossbar GL_ARB_texture_border_clamp GL_ARB_multitexture GL_ARB_texture_env_add GL_ARB_texture_cube_map GL_ARB_texture_env_dot3 GL_ARB_multisample GL_ARB_texture_env_combine GL_ARB_texture_compression GL_ARB_texture_mirrored_repeat GL_ARB_shadow GL_ARB_depth_texture GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_occlusion_query GL_ARB_point_sprite GL_ARB_texture_non_power_of_two GL_ARB_vertex_buffer_object GL_ARB_pixel_buffer_object GL_ARB_draw_buffers GL_ARB_shader_texture_lod GL_ARB_color_buffer_float GL_ARB_half_float_vertex GL_ARB_texture_rg GL_ARB_texture_compression_rgtc GL_ARB_framebuffer_object GL_EXT_compiled_vertex_array GL_EXT_draw_buffers2 GL_EXT_framebuffer_object GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_texture_rectangle GL_ARB_texture_rectangle GL_EXT_texture_env_add GL_EXT_blend_color GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_texture_lod_bias GL_EXT_abgr GL_EXT_bgra GL_EXT_stencil_wrap GL_EXT_texture_filter_anisotropic GL_EXT_secondary_color GL_EXT_blend_func_separate GL_EXT_shadow_funcs GL_EXT_stencil_two_side GL_EXT_depth_bounds_test GL_EXT_texture_compression_s3tc GL_EXT_texture_compression_dxt1 GL_EXT_texture_sRGB GL_EXT_blend_equation_separate GL_EXT_texture_mirror_clamp GL_EXT_packed_depth_stencil GL_EXT_bindable_uniform GL_EXT_texture_integer GL_EXT_gpu_shader4 GL_EXT_framebuffer_sRGB GL_EXT_provoking_vertex GL_APPLE_flush_buffer_range GL_APPLE_ycbcr_422 GL_APPLE_rgb_422 GL_APPLE_vertex_array_range GL_APPLE_texture_range GL_APPLE_float_pixels GL_ATI_texture_float GL_ARB_texture_float GL_ARB_half_float_pixel GL_APPLE_pixel_buffer GL_APPLE_object_purgeable GL_NV_point_sprite GL_NV_blend_square GL_NV_fog_distance GL_NV_depth_clamp GL_NV_multisample_filter_hint GL_NV_fragment_program_option GL_NV_fragment_program2 GL_NV_vertex_program2_option GL_NV_vertex_program3 GL_NV_conditional_render GL_ATI_texture_mirror_once GL_ATI_texture_env_combine3 GL_ATI_separate_stencil GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_EXT_texture_array GL_EXT_vertex_array_bgra GL_ARB_instanced_arrays GL_ARB_depth_buffer_float GL_EXT_packed_float GL_EXT_texture_shared_exponent
Begin MonoManager ReloadAssembly
Platform assembly: /Users/me/Downloads/CW3.app/Contents/Data/Managed/UnityEngine.dll (this message is harmless)
Loading /Users/me/Downloads/CW3.app/Contents/Data/Managed/UnityEngine.dll into Unity Child Domain
Platform assembly: /Users/me/Downloads/CW3.app/Contents/Data/Managed/Assembly-CSharp-firstpass.dll (this message is harmless)
Loading /Users/me/Downloads/CW3.app/Contents/Data/Managed/Assembly-CSharp-firstpass.dll into Unity Child Domain
Platform assembly: /Users/me/Downloads/CW3.app/Contents/Data/Managed/Assembly-CSharp.dll (this message is harmless)
Loading /Users/me/Downloads/CW3.app/Contents/Data/Managed/Assembly-CSharp.dll into Unity Child Domain
Platform assembly: /Users/me/Downloads/CW3.app/Contents/Data/Managed/Assembly-UnityScript-firstpass.dll (this message is harmless)
Loading /Users/me/Downloads/CW3.app/Contents/Data/Managed/Assembly-UnityScript-firstpass.dll into Unity Child Domain
Platform assembly: /Users/me/Downloads/CW3.app/Contents/Data/Managed/Assembly-UnityScript.dll (this message is harmless)
Loading /Users/me/Downloads/CW3.app/Contents/Data/Managed/Assembly-UnityScript.dll into Unity Child Domain
- Completed reload, in  0.158 seconds


Any ideas?