CH341SER_MAC No longer works in macOS Sierra

Development Tools IDE 1.x
8

Hi i,m very new to this type of thing and im trying to uninstall the CH341ser driver using the terminal (not used it before)

in the terminal i see this:

Last login: Fri Feb 3 09:20:12 on ttys000
Davids-MBP:~ Dave$

if i type in cd/ Librarys/Extensions at the end of Dave$ then hit enter it just reverts back to
Davids-MBP:~ Dave$

and doesnt show the driver as suggested

i'm obviously missing something here, any help would be appreciated

Dave