Control mode option greyed out in Screen Sharing
Hi,
I have a macbook with Yosemite and I was trying to connect to a friend's macbook also with Yosemite on it. However, it would only let me stay in Observer Mode and not switch to Control Mode. The option is greyed out. I've tried Googling the answer, but no luck. Any thoughts?
Thanks
MacBook Pro (13-inch Early 2011), OS X Yosemite (10.10.2)