How do I delete xpcproxy executable from /usr/libexec folder on my Mac? When I dragged it to Trash, it did not delete, neither was Command+Shift+Del helpful
You don't say why you want to delete it, so I'll assume you know what you're doing.
/usr/libexec is a folder for programs that are used by other programs.
xpcproxy is owned by
root, and so you'll need at least
root privileges (typically via
sudo) to delete it.
In addition, you may have Apple's
System Integrity Protection if your OS is fairly recent vintage. If you have
SIP, you'll need to disable it before you can delete this file. THere are numerous guides (like this one for Catalina) explaining how to disable
SIP, so I won't repeat them here.