Start Parallels Desktop. Click on the Parallels Desktop menu, select Backup with Acronis True Image.
You will see the Acronis True Image 2015 for Mac window. Click Install to start the installation process.
When the software is installed, it will prompt to enter an activation key. If you would like to use the 30-day trial license included into Parallels Desktop 11 for Mac, click on Start Trial.
Select the destination, where you would like to store the backup, by clicking on the area to the right of your Mac icon:
Then click Start Backup. The backup process will start.