I have recently bought an office class Brother printer. It works flawlessly on Linux; but it doesn’t work flawlessly on Macs, and I’ve found bug reports for the same thing going back to 2015.
When you use the Mac OS built in “scanner” app to scan to PDF, it will scan in color even when you ask it to scan in B&W; unfortunately, this will confuse the app and the pdf will be corrupted.
The recommended workaround is “scan in color” (which I do, and then use Ghostscript to convert to b&w), but it’s ridiculous.
That said, as far as quality, speed, robustness and reliability, this is the best printer/scanner/fax machine I ever used. And it works perfectly well on Linux.