Theta Edge Node v3.0.6 has now been released to enable Mainnet 3.0 features:

https://thetalabs.medium.com/theta-elite-edge-node-v3-0-6-released-to-enable-mainnet-3-0-features-7b07fc4bc7b3

One step closer to Mainnet 3.0 on June 30! MacOS users should see their Edge Node updating already, with Windows users to follow in the next few hours.