Hi Mitchell,
We confirmed S82357/F82357 can not run on OSX 10.9, that's because the driver developed by Agilent can only support 32 bit Kernal. And since OSX 10.8, the 32bit kerne lmode was removed from the system. Only 64 bit kernel mode exist. That's why we can not run the driver on new OSX system
Really sorry for this, and we have no way to solve this issue unless Agilent release new driver for their 82357B. I think currently, the only way to use GPIB on OSX is using NI GPIB interface card.
thanks and best regards