XnView Software

a) it will only recognize the same case extension for the input files. It would be nice if it would process .IMG as well as .img and .Img

you need to add *.img *.Img ...

So the following should handle the different combinations (there's no parameter for ignoring the case)?

nconvert -out png ...

Yes, I know it's a command line tool, but it needs to be put somewhere on the hard drive so it can be accessed from the Terminal. I couldn't find any such info in the documentation (which is mostly for PCs).

EDIT : I didn't find it in the docs, but in this posting it says that the nconvert binary ...

I've been looking for a way to convert IMG (Atari/Digital Research GEMpaint) files to something more common such as PNG and I was suggested XNconvert which does the job fine. I'm on the Mac OSX platform (OSX 10.9.5 Mavericks) and was hoping for a way to simply drag image files to an icon in the dock ...