fire wire support for new 26 update

1. this is a user to user forum, you are not addressing Apple or the macOS 26 developers here.
2. Apple stated firewire is now no longer supported. Doubtful they{d add it back, but you can always offer feedback at the following link.
   1. click here ➜ Feedback - iMac - Apple
3. Technology is always moving forward, Firewire has not been mainstream on anything in at least a decade. Best to start considering a different option at this point.

No you can't.

https://www.romtronic.com/why-firewire-to-usb-doesnt-work-and-never-will/

You cannot convert firewire 800 to USB at all.

You can convert Firewire to Thunderbolt, but that will require a set of very expensive adapters, so you convert from Firewire to TB1/2 and then from TB2 to TB3 and hope it works.

Honestly, Firewire is dead and should be moved away from in this day and age.

Also bear in mind that you can get Firewire to USB C adaptors.

My 3 ad converters are fw 400 and rock solid. It'd cost ~$4k to replace them. They run into a Belkin fw-tb-usb hub, which runs into an Apple-branded dongle (tb2-usb3) directly into my Apple computer. These dongles and hubs are ~$50 apiece online. I've never had a problem with this setup. It'd be a stupid shame to send it to landfill. I have an Appe-branded fw800-tb2 dongle in my cables box (~$50).

Ironically, MS and Linux continue to support fw.