Firewire Connection to a 2019 iMac

You’ll need two, a Thunderbolt 3 to TB2 adapter https://www.apple.com/shop/product/MMEL2AM/A/thunderbolt-3-usb-c-to-thunderbolt-2-adapter?fnode=8b&fs=f%3Dadapter%26fh%3D4595%252B45b0

then a TB2 to Firewire https://www.apple.com/shop/product/MD464LL/A/apple-thunderbolt-to-firewire-adapter?fnode=8b&fs=f%3Dadapter%26fh%3D4595%252B45b0

Hi, I am using a Focusrite Saffire Pro 40 audio interface which connects via Firewire. Works great with my Macbook Pro using the firewire to thunderbolt2 adapter. I just got a new iMac and bought the additional adapters to hook it up. To my surprise, my new iMac was not recognizing the audio interface. So if anyone has any tips or ideas or facts to help me, it would be great.

https://www.apple.com/shop/product/MD464LL/A/apple-thunderbolt-to-firewire-adapter

You'll also need a TB 2 to TB3 adapter

Check with Focusrite support.

https://support.focusrite.com/hc/en-gb/requests/new