VictoriaDave

I have proven (to myself) that it is the EyeTV application which doesn't like Big Sur. If I connect the entire chain of adapters and Firewire cables (because my external CD/DVD player is also a Firewire Device and is on this chain), I can run the CD/DVD drive to look at CD content and then just disconnect everything and no crash of Big Sur. (As long as I didn't launch the EyeTV app.) In other words, Big Sur is happy with my whole adapter/cable string but not the EyeTV app going away.

I have sort of the same experience. I use an EyeTV 200 box with Firewire 400 connection. A FW 400 to FW 800 cable then plugs into an Apple FW 800 to Thunderbolt 2 adapter which in turn plugs into a TB 2 to USB3/Thunderbolt 3 adapter which connects to my 2017 iMac. The EyeTV 200 box needs an external power adapter because this cable kludge can't provide enough power for this old power hungry device. Strangely this all worked perfectly in Catalina, and I can still use it now that I have upgraded to Big Sur. But once I quit the EyeTV app, there is a loud buzzing sound momentarily from the speakers and then the iMac restarts with an error message. I have tried disconnecting things in different orders. Still to try is shutting off the external power to the EyeTV 200 before I quit the app or disconnect the cable chain.

One additional tip that I might add is that for each such section that you mark and delete, you should compress immediately after before marking another section. In the old EyeTV 3 software you could mark several such sections and compress once to handle them all. I found this out in EyeTV 4 after a lot of failed attempts.

I guess there isn't a hope in heck that the 64 bit software will support an Elgato EyeTV 200 box!

I am new to this forum. I can't see how to log out. I am probably missing something very obvious as each day I see a list of current people logged in and that changes, So the rest of you have figured out how to log out.

Now that Catalina is almost here, has there been any more progress on the 64 bit version of EyeTV for Mac that was discussed in August?