.HDD file extension - Parallels Desktop or Workstation virtual hard disk
What is hdd file? How to open hdd files?
The hdd file extension is mainly associated with Parallels Workstation and Parallels Desktop for Mac virtualization software - a family of competitive products to VMware Workstation.
A typical .hdd file (Virtual Machine hard disk) contains virtual disk image of operation system and programs usable in Parallels Workstation. It is stored in the .pvm virtual machine container.
This file can be mounted by Parallels Mounter tool. Parallels Mounter allows you to browse the contents of your virtual machines and virtual hard disks directly in the Finder, without starting Parallels Explorer. But unlike Parallels Explorer, Parallels Mounter doesn't support VMware, Microsoft PC, and VirtualBox virtual machine files. Parallels Mounter is automatically installed along with Parallels Desktop for Mac.
The default software associated to open hdd file:
Parallels Workstation 
(obsolete software)
Company or developer:
Parallels Holdings Ltd.
Parallels Workstation is virtualizing application for Windows and Mac used to run multiple OS configurations at the same time on one physical PC. Parallels Workstation is compatible with Parallels Mobile app for iPad and iPhone.
Company or developer:
Parallels Holdings Ltd.
Parallels Desktop for Mac is popular virtualization software used to run Microsoft Windows and other operating systems on Mac computers running Mac OS X. It is able to run virtualized operating systems very fast with full 3D acceleration support and without lost Mac performance.
Parallels Workstation for Linux 
(obsolete software)
Company or developer:
Parallels Holdings Ltd.
Parallels Workstation is virtualizing application for Linux used to run multiple OS configurations at the same time on one physical PC. Parallels Workstation is compatible with Parallels Mobile app for iPad and iPhone.
List of software applications associated to the .hdd file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open hdd file, edit hdd file, convert hdd file, view hdd file, play hdd file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting hdd files.
Software that open hdd file - Parallels Desktop or Workstation virtual hard disk
Programs supporting the exension hdd on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open hdd file action.
Microsoft Windows:
Main software associated with hdd file by default:
Parallels Workstation (obsolete/discontinued)
Other suggested software:
VirtualBox
Apple macOS / Mac OS X:
Main software associated with hdd file by default:
Parallels Desktop for Mac
Other suggested software:
VirtualBox for Mac
Linux/Unix:
Main software associated with hdd file by default:
Parallels Workstation for Linux (obsolete/discontinued)
Other suggested software:
VirtualBox for Linux
