Fixed It!

Update: So I just made a change to the printer configuration NOT the Mac Sierra software and the scanner is now working. 

Log into the OfficeJet Pro 8620 Printer using the web interface and do the following change to the General Network Protocol Settings

Change from ipv4 / ipv6 support to ipv4 only

Change from ipv4 / ipv6 support to ipv4 only

 

Note: You don’t need to do any of the following. The IPv4 only fixes the scanning issue.

Add a domain name to the ipv4 domain name field

Add a domain name to the ipv4 domain name field

Under advanced settings for IPP add a location value

Under advanced settings for IPP add a location value

Uncheck Enable Syslog checkbox

Uncheck Enable Syslog checkbox

Under proxy settings select No Proxy

Under proxy settings select No Proxy

 

What the problems were

So the upgrade to MacOS Sierra hasn’t really ran as smoothly as I would like for the following reasons

  1. There seems to be a limit to the number of kernel modules that MacOS X will load so by the time you install VMWare Fusion, VirtualBox (for a docker environment) and osxfuse (to allow you to run encfs). I am finding VMWare Fusion won’t run if osxfuse is loaded or vice versa (I have a work-a-round for this in my setup it involved removing the legacy virtualbox modules using kextunload)
  2. I have a HP Office Jet Pro 8620 which now refuses to scan no matter what convolutions I put my laptop through.
    The error was “HP Officejet Pro 8620 – “An error occurred while communicating with the scanner. (-9923)” after upgrade to MacOS Sierra”
    I have posted to Apple Discussion forums https://discussions.apple.com/thread/7701457, checked the HP Forums and Google myself cross eyed but haven’t been able to get scanning working. And that’s even with an updated HP Printer/Scanner Driver package that was made available through the AppStore.

The scanning issue is particularly vexing because my printer model is listed as compatible with MacOS Sierra https://support.apple.com/en-au/HT201465

So the above being the case it seems that the Mac book “Pro” with MacOS is a limited edition