Originally a Windows-only standalone application, newer versions of the Bitmap Viewer are now available for both Windows and Mac (as of the November 2021 release). It is often bundled as part of the Imaging Engine or Automation Engine software suites. Bitmap Viewer 21.07 User Guide - Esko
Bitmap Viewer 10 excels at handling color separations. It allows users to toggle individual channels on and off, or overlay them to check for trapping and registration issues. For multi-color jobs (CMYK + Pantone spot colors), this overlay feature is indispensable for visualizing how the final composition will look before burning plates. esko bitmap viewer 10