To install Acronis True Image, open Parallels Desktop 13, click on the Parallels Desktop menu and select Backup with Acronis True Image.
In the opened window, click Install and wait for the download to complete:
Note: You will be prompted to enter the Mac administrator password during the installation process.
Once Acronis True Image is installed, it will prompt you to create an Acronis account. Create a new one, or click Sign in to use an existing one:
If you would like to use the 30-day trial included in Parallels Desktop 13 for Mac, click on Start Trial.