I have a MrSid file that I would like to convert to a GeoTiff. Is there a way to do this on a Mac running Mountain Lion? I know it can be done on Windows and Linux using the LizardTech command line utilities.
Here are some instructions on its use: http://www.gdal.org/gdal_translate.html
Here is the download page including some information about setting it up in Mountain Lion: http://trac.osgeo.org/gdal/wiki/DownloadingGdalBinaries http://www.kyngchaos.com/software:frameworks
If you want to build it yourself: http://trac.osgeo.org/gdal/wiki/BuildingOnMac
Depending on the binary you may have to extend it to implement MrSID functionality or it may already be in. I don't have Mountain Lion and can't say for sure.
Alternatively the same website includes other GIS software including Quantum GIS you might want to check out.