Need Software for Workgroup Videohub

I am in need of the operating application for the old Blackmagic Workgroup Videohub.
These are the discontinued (but still excellent) routers that were mounted on a rack panel and had a large heat sink in the middle.
If you or anyone you know has one of these or specifically the MAC OS software for these, please let me know.
The current Blackmagic support website only goes back to version 5.1
I'm told I need version 4.x
Thank you VERY MUCH!
Irv
laskoeirv@gmail.com
These are the discontinued (but still excellent) routers that were mounted on a rack panel and had a large heat sink in the middle.
If you or anyone you know has one of these or specifically the MAC OS software for these, please let me know.
The current Blackmagic support website only goes back to version 5.1
I'm told I need version 4.x
Thank you VERY MUCH!
Irv
laskoeirv@gmail.com