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One misconception about Macs is that there are not as many peripherals as there are with PCs. At one time this was true, but not any more.
In the old days, most peripherals went inside the computer. But now days, the usual way is to plug in a USB or Firewire peripheral. Or possibly Ethernet.
My Mac has a standard router designed for PCs. It plugs into my Mac's ethernet connector, and works flawlessly. My Mac laptop uses WiFi, the same Wifi every PC uses, and has no problem. My modem is a PC cable modem -- works great. I have a USB printer that also works on PCs. My firewire hard drive is formatted for the Mac, but if reformatted I would bet would work with Windows (maybe I am wrong, but I won't be reformatting it any time soon). I use a wireless Microsoft mouse, also for the PC. Works perfectly.
The only limitation the Mac has is that there are fewer programs written for OS X. This will change. But for the 90% who use the computer for internet, photography, word processing, spreadsheets, and for MP3 files, the Mac works fine. And it is easier to use. And it never crashes. And it has file search and management capabilities the blow Windows out the door.
I don't understand why there has to be an argument about a product that is so clearly superior.