This patch worked for me. I had to dust off some old linuxy cobwebs related to patching first. If anyone else is having trouble applying it without DKMS this is what I did: Mount the parallel-tools cd by going to Actions | Install Parallels Tools from the main menu on your MacOS host Copy the whole contents of the cd to your local hard drive (should be same dir where you downloaded the patch), it should be in something like /media/username/Parallels Tools go to the directory where you copied the files from Parallels Tools to go to the kmods directory extract prl_mod.tar.gz with something like tar zxf prl_mod.tar.gz apply the patch as GM originally suggested cd .. patch -p1 < parallels-tools-16.1.x.x-kernel-5.11.x.txt. (substitute the right version numbers for your specific patch) Pick the default response of [n] should you run into any parts of patch that were already applied After the patch has been applied rename prl_mod.tar.gz to something like prl_mod.tar.gz.orig Create a new tarball with the patched files cd kmods tar zcf prl_mod.tar.gz * At this point you have patched your local copy of the parallels-tools installer Go to the top level dir of the local installer, cd .. Run the install script, sudo ./install I hope this makes it a bit easier for the next one to run into this issue. And add one gripe point from me for the Parallels guys for making us go through this at all on a paid product that supposedly has support.