When the Xerox VersaLink C405 is out of one of the three color toners, you can still print to it using Black and White mode.
From Preview
From Adobe Acrobat
From Preview
1 - Open print panel by going to File > Print or hitting ⌘+p

2 - On print settings panel scroll down to [Printer Options] and under that [Xerox Features].

3 - On the Xerox Features window, look for an option for [Xerox Black and White].

4 - On the Xerox Black and White option, select [On]

5 - Once [Xerox Black and White] has been turned on, click [OK] to go back to the main print options window and then click [Print] button.

From Adobe Acrobat
1 - Open print panel by going to File > Print or hitting ⌘+p

2 - On the print settings panel, click the [Printer…] button in the lower left.

3 - On the Print… panel, look for [Printer Options], and below that [Xerox Features]