Hi karimnagati,
To retrieve data from your Virtual Machine on your Mac follow the steps outlined below:
1. Locate the .pvm bundle of the Virtual Machine on your Mac HD using Spotlight > right click on the found .pvm file and choose "Show package content";
2. Inside you will see an .hdd file -> right click on it -> open with Parallels Mounter. The virtual machine's hard drive will be mounted to your file system and should appear in Finder;
3.1. If a new drive appeared in Finder, open it and copy folders that you need to Mac HD step-by-step (not all folders at once).
Note: At this step some folders may fail to be copied. It means that they or their contents were corrupted. If you meet such a folder, open it and try to copy its contents the same way, step-by-step.
3.2. If no new drives appeared in Finder, it means the virtual machine's critical part was corrupted and there is no way to retrieve data from it using Parallels utilities.
Thanks,
Looran