Cuprum is a multi-layer Gerber and Excellon viewer for the Mac platform.
It supports viewing (and printing) multiple layers at the same time.
A QuickLook plugin is integrated in the app, so you can preview files in the Finder and other apps.
-Reads Gerber and Excellon files
-Supports Gerber X2
-Measurement tool with advanced snap.
-Cuprum allows full zooming and navigation of the image with an intuitive interface whether you use a trackpad, magic mouse, normal mouse or pen tablet. Even your 3DConnnexion 3D mouse is supported!
-It can also zoom to actual size, which corrects for different monitor DPI’s, so actual size is actually actual size.
-Multi-page print out (or PDF generation via the print panel) is supported with variable scaling and presets for actual size and page fill. Frames can be added with string substitution.
-A QuickLook plugin is integrated which allows Finder to show a preview of a document.
-Selection of objects, allowing inspection of all properties.
-Highlighting of connected copper.