hello @paulvanderlaan, it turns out the problem is not related to Mechanic2 at all, but to old macOS 10.10 which gets confused when multiple certificates are attached to a domain – this causes Safari and macOS to think that the certificate is invalid (it works in Firefox and Chrome though). the good news is that you can use an older version of Mechanic (zip link) which is a bit slower but can display extensions from the Extension Store on macOS 10.10. thanks @frederik for looking into it!

Okay, that's all for now. Apologies for the long posts! ;)

Thank you. That's great to hear Frederik. Please wait a little with pushing an update. I encountered a bunch of small errors that you might want to have a look at too. Will post them shortly.

Thank you for the responses. I wondered if yellow was simply advisory, but happy to have confirmation. Much appreciated. Cheers

Awesome, thanks Frederik and Tal!