I'm a teacher using Apple Remote Desktop. My computer is running 10.10.5 and my students are running 10.10.4 and I have Remote Desktop 3.8. Since upgrading, i can no longer screen share with all 27 computers in my lab. Screens just go black and stay black, even though ARD tells me it was successful. I can take control of half of the computers but not all. Worked fine before upgrading to Yosemite.
