System Preferences > General <img width="668" alt="screenshot 2015-10-28 01 03 39" src="https://cloud.githubusercontent.com/assets/1912849/10765897/f9694c64-7d0f-11e5-8273-584991d66116.png"> Dark menu bar disabled: <img width="224" alt="screenshot 2015-10-28 00 54 42" src="https://cloud.githubusercontent.com/assets/1912849/10765804/861405ce-7d0f-11e5-9e80-e1af297cf685.png"> Dark menu bar enabled: <img width="224" alt="screenshot 2015-10-28 00 54 56" src="https://cloud.githubusercontent.com/assets/1912849/10765817/9549a3be-7d0f-11e5-96d2-8b97b2790171.png">