How do I generate a key hash for the Facebook SDK On Mac?

I used following steps to generate a Key Hash for my app in facebook: (I am using Mac OSX 10.8)

1. First open a terminal (open a command prompt in windows).
2. Navigate in the terminal to the directory where your Android debug.keystore is stored.
3. Mostly it will located under “/Users/user_name/.android/” (In Windows will be C:\Documents and Settings\.android).

4. Once you are in the “.android” directory, run the following command.

   keytool -exportcert -alias androiddebugkey -keystore debug.keystore | openssl sha1 -binary | openssl base64

5. When it prompts you for a password, type android and hit Enter

6. Copy the value printed in the terminal that ends with an “=” and
   paste it in the Key Hash field in Facebook. Then click the Save
   Changes button.

Reference: Integrate Facebook logins in your Android app