My 2011 Mac does not recognjce Roon 2.0

In menu ‘About Roon’ it shows: 'Roon version 1.8 (build 1105) stable."
Then jt says
“You have the latest version installed”
So, I’m unable to install the latest version and, wkth that, the Roon Remote on the phone & tablet don’t recognize the core.

Can you please help me. Can this be due to my Mac age (2]11)?

Thank you very much.

Roon Core Machine

Networking Gear & Setup Details

Connected Audio Devices

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Description of Issue