It's just like always. Only tried to cheap all scrap. Has everything with Yosemite is not working. Bought this original adapter from Apple, connected and worked immediately without any installation of drivers, etc. right away at my MacBook Pro and the iMac. That was me back a lesson. Without Original products you only have trouble in the long run. So rather buy equal the original and is good. Now I have to update the operating system no trouble what these NoName products constantly the case if the work at all times.