We have to enable legacy VNC and set a new password (as I can't figure out what the current password is):
<pre>
sudo # root@t-yosemite-r5-0001vncpw=supersecret/System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart \
-configure -allowAccessFor -allUsers -privs -all
sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart \
-configure -clientopts -setvnclegacy -vnclegacy yes
sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart \ -configure -clientopts -setvncpw -vncpw supersecret${vncpw}sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart \
-restart -agent -console
</pre>
