I live about 500 miles from my iMac and had some family members help me install Mavericks on my external hard drive I use for beta testing software. Running Mountain Lion Team viewer worked perfectly fine, I was able to reformat the disk and start the install of 10.9. Via phone call I was able to guide my sister and mom into getting past the setup screens and to the desktop on 10.9. But every time I try to use Team viewer to remotely login, I can't. When I use my laptop (Windows 7, and in a virtual machine of Win8) I get a window I've never seen before that gets stuck at "Initializing Display Parameters" I gave it about 30 minutes once before I gave up. When I use my iPad 2 all it says is Connecting and has a spinney white circle. Internet works fine on the iMac but Team viewer doesn't and I am not sure why.