SymptomsYou have upgraded your Host operating system from Tiger to Leopard and decided to install Parallels Desktop 4.0. The installation fails with error message shown below:
CauseThis happens due to failed MacFUSE link.
ResolutionTo resolve the issue, please do the following:
1. Open Finder
2. Navigate to /Library/Filesystems/
3. Locate fusefs.fs
4. Drag fusefs.fs to Trash
5. Run Parallels Desktop 4.0 installation
Installation of Parallels Desktop 4.0 should be fine after accomplishing this instruction.