Hello,
I also have a 6027 connected to a Mac via USB and I try to "Scan to PC" it displays it is "Processing" it and afetr few seconds I get a "time out error".
This feature used to work without a problem until few months ago.
I am running on macOS Sierra 10.12.4
and got the latest driver + firmware installed on my mac and printer / scanner
Assistance is appreciated
Thanks in advance
Alonso