I upgraded to Parallels 17 when it came out and it was running find on my laptop. Recently I upgraded to the latest version (17.1, build 51516). Now all my Linux VMs that run on CentOS 7 immediately crash on boot with a "Kernel Panic - not syncing: fatal exception" error message (right after the kernel version selection screen): I tried another Macbook with a clean install of Parallels 17.1, but that gave the same result. Parallels support thought that the VMs were corrupted and advised me to reinstall them. That would have taken me a lot of time, since they are all configured for various development purposes. Instead, I downgraded to Parallels 16 and everything seems to be working again Looks like there's some kind of incompatibility with CentOS 7 and Parallels 17.1. And yes: I should upgrade those CentOS 7 VMs to a newer version some day.... A colleague of mine is also running Parallels 17 with similar VMs and doesn't have any issues. I advised him to not upgrade to 17.1.