/BR is a retail (BR = Buffalo Retail for Select-branded modules) package that contains memory with a /BJ (BJ = Buffalo RoHS compliant) part number. These modules are JEDEC compliant and should work in most Macs. However, they are not tested in Macs.
Our TechWorks brand, are designed for and tested in Macs. TechWorks brand will rarely have issues in Macs, due to the extended testing for compatibility in Macs.
I mentioned that the machine in question does seem to boot fine with this RAM but the user is experiencing crashes and freezes. I ran the Apple Hardware Test for this machine and it fails the RAM every time. I replaced the RAM with some Kingston ValueRam from another machine and AHT is happy with it. Time will tell if that was the major cause of the problems or if the system software was also a contributor.
Thanks for the info. I'll make sure to always purchase the stuff that has been "tested" and confirmed for use in Apple machines from now on.