Would recommend not installing the tools. Parallels Tools – VM can get stuck on a black screen after the reboot. Some reports say that after installing VM tools the system boots fine YMMV. VM Tools – Even though Big Sur to works on Parallels and Fusion, do not install VM tools yet.VMWare Fusion 7 – JIT Enquirer reviews Parallels Desktop 10 for Mac: ‘It’s a lot faster’ – August 22, 2014 Running Windows on your Mac: Parallels Desktop 10 vs.