If you're working with CAD files on a Mac, finding the best DWG viewer is essential for seamless viewing and editing. While AutoCAD is not natively available for Mac, there are several great options for DWG viewers. Here are some of the top choices for Mac users:

1. AutoCAD for Mac: AutoCAD does have a version specifically designed for Mac users. It provides powerful tools for 2D and 3D design and allows you to view, create, and edit DWG files seamlessly.

2. BricsCAD: BricsCAD offers a full-fledged CAD software for Mac that also supports DWG files. It provides a familiar interface for AutoCAD users and offers a range of powerful features for design and drafting.

3. DWG Viewer by DWG FastView: This is a lightweight and fast DWG viewer for Mac that allows you to open and view DWG files with ease. It also supports zoom, pan, and rotate functions for better file exploration.

4. LibreCAD: If you're looking for an open-source option, LibreCAD is a great choice for Mac users. It supports DWG files and offers essential 2D drawing tools for drafting and design.

5. DraftSight: DraftSight is a professional-grade 2D design and drafting software that supports DWG files and is available for Mac. It provides essential tools for creating, editing, and annotating DWG files.

When choosing the best DWG viewer for Mac, consider factors such as file compatibility, features, ease of use, and your specific design requirements. Whether you're a professional designer or a hobbyist, having the right DWG viewer can make a significant difference in your workflow and productivity on a Mac.