Dell 2155 cdn: duplex not working with OSX 10.11.4 (15E65)
After update to OSX 10.11.4 (15E65) the duplex printing on my Dell 2155 cdn is no longer working. Any hints to fix the issue. Same problem occurs on different computers. So fare I never had any problems with the printer running on my Macs.
PS: De- and re-install od printer driver doesn't help