When you need to open and view .vsd format Visio drawings and diagrams you need Enolsoft’s Visio Viewer for Mac OS (10.7 and higher). It provides zoom-in, zoom-out, rotate and text-search tools.

To view a large multi-page Visio file, you can select a display mode from four choices: Single Page, Single Page Continuous, Two Pages and Two Pages Continuous. A multi-tab display is also supported in case you need to switch between several visio files for comparison.

Besides providing Visio viewing for Mac users, the app also allows you to convert Visio files to PDFs. The converted PDF file all original elements intact — including lines, color and fill, and more.

Visio Viewer is available for US$29 at www.enolsoft.com . A demo is available for download.