WiFi + LAN network bridging issue

Networkwifi

I'm trying to bridge a wifi network to some devices that are network connected directly to my MacPro but am running into problems.

Both networks work fine on their own but when bridged both go inactive, and I also lose WiFi controls i.e. what network to choose in my available area.

Is there something i'm doing wrong? I couldn't find any meaningful Apple documentation on the feature.
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Best Answer

go to System Preferences > Sharing and check "Internet Sharing" and choose WiFi in the first drop down and Thunderbolt in the second.