# install GnuPG
brew install gpg

# generate gpg key pair
gpg --gen-key

# list keys
gpg --list-keys

# export public key
gpg --armor --export <pubuid> > public.key

# import public key
gpg --import public.key

# encrypt file
gpg --output <file.enc> --encrypt --recipient <key recipient name / email> <file>

# decrypt file
gpg --decrypt --output <file> <file.enc>

# remove key
gpg --delete-key <key recipient name / email>