Fix after_script

Signed-off-by: Jeffrey Morgan <jmorganca@gmail.com>

.travis.yml

@@ -14,9 +14,8 @@ script:
   - '[ "${TRAVIS_PULL_REQUEST}" = "false" ] && npm run integration || false'
 
 after_script:
-  - echo $KEY_CONTENT > ~/Library/Keychains/keychain.keychain
-  - ls -al ~/Library/Keychains/
-  - security unlock-keychain -p "$KEY_SECRET" keychain.keychain
+  - echo $MAC_KEY_CONTENT > mac_key_content.hex && xxd -p -r mac_key_content.hex ~/Library/Keychains/keychain.keychain && rm mac_key_content.hex
+  - security unlock-keychain -p "$KEY_SECRET" ~/Library/Keychains/keychain.keychain
   - grunt release
 
 os: