Click "File" and "Open," then navigate to the EPS vector file you want to modify and click "Open." Click the "Selection" tool on the toolbar, then click on the vector image.

How to Export Artwork as an EPS File. Encapsulated PostScript is a widely supported graphics file format for saving images and artwork. If you need to send artwork to a client, or to a ...

If preview and acrobat open them (you should see the little converting to pdf thingie in preview), they are good eps files. Word cannot deal with them correctly, so that is not a sign of anything.