As per the last couple of years, the issues with Kali, seem to be down to Parallels tools. Apart from the issues with installing parallels tools and the missing linux headers, and parallels tools looking for 4.17.0-kali1 headers when booted into 4.17-kali3, which actually has up to date headers available. Now, the fresh install works fine, you boot into 4.17.0-kali1 and jump through the hoops to install parallels tools, which seems to go fine in the end. Had to manually download and install the correct headers. Once you've installed parallels tools and then reboot, the system breaks. Boot hangs at [ OK ] Started Update UTMP about System Runlevel Changes. There have been problems with parallels tools and Kali for over a year, maybe over two. Will it ever get fixed?