Out of memory when running the camera demo on a single machine

I'm on a mac 15" with nvidia, cuda, cudnn installed and getting this:

> qlua webcam/single_machine_demo.lua
> loading checkpoint from data/models/densecap/densecap-pretrained-vgg16.t7
> done loading checkpoint
> THCudaCheck FAIL file=/tmp/luarocks_cutorch-scm-1-8066/cutorch/lib/THC/generic/THCStorage.cu line=65 error=2 : out of memory
> qlua: /Users/yosit/torch/install/share/lua/5.1/nn/utils.lua:11: cuda runtime error (2) : out of memory at /tmp/luarocks_cutorch-scm-1-8066/cutorch/lib/THC/generic/THCStorage.cu:65
> stack traceback:
> [C]: at 0x010c1f0870
> [C]: in function 'resize'
> /Users/yosit/torch/install/share/lua/5.1/nn/utils.lua:11: in function 'torch_Storage_type'
> /Users/yosit/torch/install/share/lua/5.1/nn/utils.lua:57: in function 'recursiveType'
> /Users/yosit/torch/install/share/lua/5.1/nn/Module.lua:152: in function 'type'
> /Users/yosit/torch/install/share/lua/5.1/nn/utils.lua:45: in function 'recursiveType'
> /Users/yosit/torch/install/share/lua/5.1/nn/utils.lua:41: in function 'recursiveType'
> /Users/yosit/torch/install/share/lua/5.1/nn/Module.lua:152: in function 'type'
> /Users/yosit/torch/install/share/lua/5.1/nn/utils.lua:45: in function 'recursiveType'
> /Users/yosit/torch/install/share/lua/5.1/nn/utils.lua:41: in function 'recursiveType'
> /Users/yosit/torch/install/share/lua/5.1/nn/Module.lua:152: in function 'type'
> /Users/yosit/torch/install/share/lua/5.1/nn/utils.lua:45: in function 'recursiveType'
> /Users/yosit/torch/install/share/lua/5.1/nn/utils.lua:41: in function 'recursiveType'
> /Users/yosit/torch/install/share/lua/5.1/nn/Module.lua:152: in function 'type'
> /Users/yosit/torch/install/share/lua/5.1/nn/utils.lua:45: in function 'recursiveType'
> /Users/yosit/torch/install/share/lua/5.1/nn/Module.lua:152: in function 'type'
> ./densecap/DenseCapModel.lua:199: in function 'convert'
> webcam/single_machine_demo.lua:185: in function 'main'
> webcam/single_machine_demo.lua:256: in main chunk

any idea