How can I convert SVG image to something raster? Are there any native [command-line] tools on OS X that can do that? I am able to open them in Safari or Firefox, but doing "Save as..." only proposes original (.svg) or web-archive formats. No rasterized image format.
You can do this with Inkscape:
To change output resolution you can set the DPI value:
Here are more command line options.
One (wonky) option would be to render it in Safari and take a screenshot of the result, although that's obviously not a good solution.
Sadly there's little SVG support in OS X so far apart from Safari, Preview.app (the obvious choice for image format conversion) can't render it and I'm not aware of any bundled command line tools that can either.