Re: It's the usual story.
I plugged in my Canon EIDE 60 scanner into my 2012 MBP and was able to scan documents without having to any external drivers.
OSX does seem to install something when you plug in new kit, but it appears Apple has managed to get manufacturers to contribute to an Apple hosted repository so it's pretty much seamless as soon as you have acknowledged that the device it has found is correctly identified. It's quite helpful if you're in a new place with a printer on the network - as long as you have Internet access you'll be printing in minutes.
About the only think that broke the norm was a Dymo/CardScan 800c business card scanner because that needs its own OCR software too to be of any use (which took a long time to get updated to 10.12).
Biting the hand that feeds IT
