GraphicConverter

GraphicConverter is computer software for macOS that allows display and edits to raster graphics files. It also converts files between different formats.
The program has a long history of supporting the Apple Macintosh platform, and at times it has been bundled with new Mac purchases.
, GraphicConverter can import about 200 file types and export 80. Images can also be retouched, edited, and transformed using tools, effects and filters. The software supports most Adobe Photoshop plug-ins, including TWAIN. The application features a batch processor, slideshow mode, image preview browser, and access to metadata comments.
GraphicConverter is available in more than a dozen languages including:

Old versions that run on classic Mac OS are available for download and include a license key. These versions are no longer supported, however.
The currently supported version runs on macOS, is available as shareware, and is maintained by LemkeSoft, a software company based in Peine, Lower Saxony, Germany.