Is there anything on a mac that lets me batch rename photos? Specifically, I'm looking to do this: For example, if I have 500 photos called DSC_0001-DSC_0500, and I want to change the DSC to something like XYZ, for XYZ_0001-XYZ_0500. Thats what I need to do. I know how to batch rename in a sequence, which is easy, but my photos I need to change are all random numbers, like DSC_2876, DSC_2988, DSC_3801 and so on, and those need to change to XYZ_2876, XYZ_2988, and XYZ_3801. I need a FAST, and free way to do this, must be fast. I can't use Lightroom because it's slow as balls.