Okay...I'll bite....
Apple cannot be expected to stay on top of the millions of new peripherals that are released on a daily basis and have all of them "just work" when connected.
All of my devices DO work with one exception, my scanner. That was listed as being designed for Windows XP, though. It made no mention on the packaging that it would work on Mac. I have tried some drivers and still cannot get it to work. I never got rid of the PC, so I still use it.
On the other hand... the digital camera, printer, joysticks, mice, flash drives, keyboards, microphones, video cameras, digital audio recorder, PC cards and samplers I have ALL work with no additional software or drivers needed.
Yes, it is true that almost everything will just work if you plug it in your Mac. However, some hardware manufacturers simply don't design their products to work on Mac. Usually, it is the lower end models, but sometimes it is the others. Just make sure the packaging lists Mac as a supported OS. You may have to visit the manufacturer's website for a driver, but it will work if the box says it should. If it makes no mention of Mac OS, then you will have the chance it won't work.
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