If you're a Mac user working with CAD files, finding a reliable DWG viewer for Mac OSX can be a challenge. AutoCAD, the industry standard for CAD software, is not natively available for Mac users, making it difficult to access and edit DWG files on a Mac. However, there are several third-party DWG viewers and editing tools available that are specifically designed for Mac OSX. Here are some of the best options to consider:

1. AutoCAD for Mac: While AutoCAD is not natively available for Mac, Autodesk does offer a version of AutoCAD specifically designed for Mac users. This powerful software allows you to view, edit, and create DWG files on your Mac, providing a comprehensive set of tools for CAD design.

2. BricsCAD: BricsCAD is a popular alternative to AutoCAD that is available for both Windows and Mac OSX. It provides full support for DWG files and offers a wide range of features for 2D drafting and 3D modeling, making it a great choice for Mac users looking for a fully-featured CAD solution.

3. CorelCAD: CorelCAD is another excellent option for Mac users, offering comprehensive support for DWG files and a range of powerful design tools. With CorelCAD, you can create, edit, and annotate DWG files with ease, making it an ideal choice for Mac users who need a robust CAD solution.

4. LibreCAD: If you're looking for a free, open-source option for viewing and editing DWG files on Mac OSX, LibreCAD is a great choice. This lightweight software provides essential CAD tools for creating 2D designs and is perfect for users on a budget.

No matter which DWG viewer you choose for Mac OSX, it's essential to select a tool that meets your specific needs for viewing and editing CAD files. Whether you're a professional designer or a hobbyist, there are plenty of options available to help you work with DWG files on your Mac. With the right DWG viewer, you can access and edit CAD files seamlessly on your Mac OSX, empowering you to bring your design ideas to life.