Hello Bob,
Unfortunately, macOS 10.11 was the last Mac driver we made for the 6180. You could try printing by adding the printer on macOS using the built-in “Generic Postscript PPD”.
If Xerox driver features are really needed, you could try an unsupported work-around in which you install the Xerox macOS Common Print Driver from a closely related product which is supported on Big Sur. Note that there may be incompatibilities that could cause not all features/functions to work properly.
And lastly, if a specific scan driver or a print driver is not available AirPrint and Scan to Email may be used as a workaround.
Made the mistake of installing Big Sur on my I-Mac (5 years old), now the new system won't let me download the driver. Any help would be appreciated. Not crazy about paying for a new prnter.
Thanks