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I bought a second hand Direto (2 year old) which I want to connect with Zwift wia my old iMac (2011 model). It all runs properly on my pc but the iMac can't find the Direto via bluetooth. Any ideas how to clear this https://speedtest.vet/ https://vidmate.bid/ ? I know it's an old computer but the screen is very nice so I'd like to give it a go.

Hi

You have to check if your iMac supports bluetooth 4.0 or higher.
Bluetooth 4.0 has started to be supported on Mac around the year 2011, so this may be the cause of the problem

Regards