If you're looking to open a MAX file, you'll need the right software to do so. MAX files are associated with Autodesk's 3ds Max software, which is used for 3D modeling, animation, and rendering. Here's how you can open a MAX file:

1. Use 3ds Max: If you have 3ds Max installed on your computer, opening a MAX file is as simple as double-clicking on the file. 3ds Max will automatically launch and load the MAX file for you to work with.

2. Use other software: If you don't have access to 3ds Max, there are other programs that can open MAX files. Some third-party 3D modeling software, such as Blender, can also import and work with MAX files. You can also use Autodesk's free software, such as 3ds Max viewer, to open and view MAX files without the need for a full 3ds Max installation.

3. Use online converters: There are online file conversion services that can convert MAX files to more common file formats, such as OBJ or FBX, which can be opened with a wider range of 3D software.

It's important to note that MAX files are proprietary to 3ds Max, so not all software will be able to fully support or edit these files. If you need to collaborate with others or share your work, it's best to export your MAX files to a more widely supported format.

In conclusion, opening a MAX file is straightforward if you have 3ds Max installed on your computer. If not, using alternative software or online conversion tools can help you access and work with MAX files. Keep in mind the limitations of using non-3ds Max software with MAX files, and consider converting the files to a more universal format if needed.