Comentário oficial
Hello Louis,
DDJ-RB engineers are looking at your issues and would like to check the following.
1. Did you download and install the Mac driver for El Capitan (this is also for Sierra) from the link below?
https://www.pioneerdj.com/en/support/software/ddj-rb/
If it is not, please install this driver from the link.
2. You are not able to update the firmware possibly because you might have not been in the firmware update mode of DDJ-RB yet.
Will you please see the link below for further details?
If you still have any issues, please let us know.
Thanks,
CRM, Pioneer DJ