Unlock with GPG Keys does not prompt for Password

So, the problem is I try this:

```bash
$ git-crypt unlock

You need a passphrase to unlock the secret key for
user: "Christoph Gnip "
4096-bit RSA key, ID 1C2B032A, created 2015-06-19 (main key ID B327F778)
```

This message appears, but it does not stop at this point.
So I'm not able to enter my password.

My System is a OSX machine with El Capitan.

What am I doing wrong? Has someone an idea?