Complete cleaning of parallels:
Commands in the terminal:
Code:
sudo rm -rf /Library/Parallels
rm -rf ${HOME}/Library/Preferences/Parallels
+ if you had additional extensions for Parallels

run
Code:
rm -rf ${HOME}/.vscode/extensions/parallelsdesktop*

Blocking of knockers in hosts:
Code:
127.0.0.1 update.parallels.com
127.0.0.1 Desktop.parallels.com
127.0.0.1 update.parallels.com.cdn.cloudflare.net
127.0.0.1 Desktop.parallels.com.cdn.cloudflare.net
127.0.0.1 www.parallels .cn
127.0.0.1 www.parallels.com
127.0.0.1 www.parallels.de
127.0.0.1 www.parallels.es
127.0.0.1 www.parallels.fr
127.0.0.1 www.parallels.nl
127.0.0.1 www.parallels.pt
127.0.0.1 www.parallels.ru
127.0.0.1 www.parallelskorea.com
127.0.0.1 reportus.parallels.com
127.0.0.1 Parallels.cn
127.0.0.1 Parallels.com
127.0.0.1 Parallels.de
127.0.0.1 Parallels.es
127.0.0.1 Parallels.fr
127.0.0.1 Parallels.nl
127.0 .0.1 Parallels.pt
127.0.0.1 Parallels.ru
127.0.0.1 Parallelskorea.com
127.0.0.1 pax-manager.myparallels.com
127.0.0.1 myparallels.com
127.0.0.1 my.parallels.com
127.0.0.1 download.parallels.com

If during patching Parallels tool with SIP enabled. If you had a trial account, in order to log out of it, you need to comment out both:

Code:
#127.0.0.1 myparallels.com
#127.0.0.1 my.parallels.com
then, after logging out again, write

Code:
127.0.0.1 myparallels.com
127.0.0.1 my.parallels.com
If you need to download an OS (for example, the Parallels Windows installer), you will have to unlock it in hosts:

Code:
127.0.0.1 download.parallels.com
127.0.0.1 desktop.parallels.com
127.0.0.1 download.parallels.com.cdn.cloudflare.net
127.0.0.1 desktop.parallels.com.cdn.cloudflare.net
putting the # sign

Code:
#127.0.0.1 download.parallels.com
if you encountered very slow performance, disable accessibility features (system settings --> privacy & security --> accessibility features)