Need to save a sprite to specified area rather than bundle

When I use RenderTexture to save a sprite, it saves it to the bundle area on the Mac (seems to work fine on Windows). Is there an alternate way to save the sprite out, perhaps converting it to CCImage and using saveToFile()? I’m trying that, but can’t see how to convert it yet.

I don’t know why RenderTexture won’t take an absolute path, always writes to the bundle? Or am I (hopefully) wrong?

[Never mind: I realized that it’s writing to the Documents folder, and I’m able to move the file in a callback after it’s created]