message won't connect with mac user on other end for screen sharing
Recently my messages app on my macbook won't allow me to connect with my friend on the other end whom I used to screen share with often in order to help them trouble shoot things on their computer. We both recently upgraded each computer to mountain lion in hopes that would cure the issue but we keep getting error messages saying the other user can't connect. please help!!!!!
MacBook Pro, OS X Yosemite (10.10.4)