My installation of Parallels on OSX10.14.6 has been stable for several years, within the last few days there has been an update to PArallels, and now Parallels won't start successfully, giving the error message "Unable to start Parallels services." I've tried the following and the problem has not changed. Safe Boot sudo kextcache --clear-staging sudo touch /System/Library/Extensions Delete and Reinstall Parallels Grant Parallels Full Disk Access I haven't tried reinstalling the operating system yet because I have a lot of other applications that might be affected by that, and I would need to make two full backups first. Has anyone found a resolution to this problem? Has the operating system reinstall worked for anyone here? This is kind of a big deal for me as my Tax SW is on Windows under PArallels and I'm running out of time to make an update.