I had problems installing Parallels Tools in Backtrack 5 R1. After spending too much time searching for a solution i finally found an embarrassingly simple one. And since sharing is caring, here you go.
Before you install Parallels tools you need to:
After that the installation ran just fine.Code:root@bt:~# ln -s /usr/src/linux /lib/modules/220.127.116.11/build
Os X 10.7 (Lion)
Backtrack 5 R1