Allow execution of a binary that was downloaded:
xattr -d com.apple.quarantine /path/to/file
Openssl development setup
After installing Openssl, header and libraries are not found. This is solved by copying manually the Openssl pkgconfig files:
brew install openssl
cp /usr/local/opt/openssl@1.1/lib/pkgconfig/*.pc /usr/local/lib/pkgconfig/