I have been unable to Add my Canon i960 Printer, since Public Beta 1.
I provided the feedback.
Still not adding (on an a 2009 Mac Mini and 2012 iMac 27), even after this latest Public Beta.
I'm now thinking it has something to do, with the drivers "not being signed", to work/install under Yosemite.
My theory make sense or am I off?
Perhaps Canon just needs to update all their printer drivers, to work with Yosemite