I have installed vRealize Operations Manager Appliance for vSphere 6.0 with no issues. It starts up fine. When I try to go to one of the URLs in a web browser to reach the User Interface, it sits on the message "Data Retriever is not initialized yet. Please wait..." and the login fields are grayed out.
When you start the appliace this is normal, but after 5-10 minutes the login screen should appear normally.