The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
I have an external device that has a Firewire 400 output. On my previous iMac, I used a Firewire 400 to 800 adaptor to connect it.
My new iMac does not have the Firewire 800 port only USB and Thunderbolt 3.
Is there a way to adapt from Firewire 400 to Thunderbolt 3 (USB-C)?
iMac 27", macOS 10.15
Yes, but you will need three adapters to do that.
USB-C to Thunderbolt 2 > Thunderbolt 2 to FireWire > FireWire 800 to FireWire 400
Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - Apple
Apple Thunderbolt to FireWire Adapter - Apple
then your existing 800 to 400 adapter.
Yes, but you will need three adapters to do that.
USB-C to Thunderbolt 2 > Thunderbolt 2 to FireWire > FireWire 800 to FireWire 400
Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - Apple
Apple Thunderbolt to FireWire Adapter - Apple
then your existing 800 to 400 adapter.
Firewire 400 to Thunderbolt 3
