You could have downloaded OSMtoIMG 1.0 for Mac from our software library for free. The most popular version among the program users is 1.0. This free Mac application is an intellectual property of GOTOES. Our antivirus check shows that this Mac download is clean. The application is included in Audio & Video Tools. The common filename for the program's installer is OSMtoIMG.app.zip.
From the developer:
The map file that is exported from open street map is in osmarender format (OSM). This format cannot be uploaded as a map to your Garmin GPS... but using the free program, you can convert OSM maps to IMG maps within a few seconds. Learn how to do this with the instructional video.
You may want to check out more software for Mac, such as ImTOO HD Video Converter, Tipard DVD Audio Ripper for Mac or Tipard MKV Video Converter for Mac, which might be similar to OSMtoIMG.