This directory holds Apple developer certificates, and the corresponding public/private keys. For example: certname.cer -- The final certificate signed by Apple. certname.csr -- The Certificate Signing Request, generated with the Mac app "Keychain Access". certname.key.p12 -- The private key for this certificate, created when the CSR is created. exported from "Keychain Access". certname.pub.pem -- The public key for this certificate, created when the CSR is created, exported from "Keychain Access". The certificates: leap-developer-id-application This is used for distributing the application outside the app store. leap-developer-id-installer This is used for distributing an installer outside the app store.