Brother laser printer HL-L3230CDW Duplex issue

[aspaswki]

I just bought a Brother laser printer HL-L3230CDW and although I have the two-sided printing option, while it is printing it doesn't use the duplex printing facility. I have a Mac OS 10.14 Mojavi. I have tried everything. I also made sure when i installed the drivers to use the CUPS option of printer but again nothing. Can anybody help me? Thank you in advance!

 

[MacGizmo]

CUPS is the OS version of the driver, which is typically very generic - leaving out features such as duplex, etc. Try using their proprietary version of the driver (if it will work under Mojave).