Files with a .vmac extension contain configuration data for a virtual machine used by VMware Workstation and other VMware applications. The VMware Configuration file format (.vmac) was created by VMware to store settings for their virtualization platforms.
While .vmac files may not be meant for direct user access, problems opening or using these files typically indicate an issue with the VMware software installation. Possible problems include file corruption, missing Windows registry entries, or an incomplete VMware software installation.
Specialized software is required to open .vmac files. The VMware Workstation program that created the file can open and edit .vmac configuration files. Third party tools also exist for viewing, editing, converting or comparing .vmac files without needing the VMware software installed locally.
The .vmac extension is one of over 1300 file types categorized as Settings Files. VMware created the VMware Configuration file format standard that .vmac files follow, optimized for virtual machine configuration data storage and portability across VMware platforms. As a proprietary VMware format, .vmac files are primarily used on Windows operating systems running VMware software.