>Pages on the Web don't look the same either.
That statement would be more accurate if expanded to "pages on the Web don't look the same if you use any browser other than Internet Explorer (Microsoft) where the website developer has not followed WWW Consortium HTML standards."
I mostly use Windows, and prefer the Firefox browser, but I keep IE around for those few sites that stubbornly (or ignorantly) insist on using only Microsoft proprietary development tools. Microsoft entered the Internet universe late in the game, kicking and screaming and imposing its own proprietary "tweaks" to the already developed open source solutions. Apple, though guilty of some other early restrictive proprietary demands, was in from the beginning.
Enough of the rant; I could go on :-) Basically, don't worry about the few websites that may not display "properly." If you absolutely HAVE TO visit them, alternate browsers to Safari (Apple) are freely available -- Opera, IE, Firefox -- likely one of those will work. Personally, Image Shack is not my favorite, but I have not tried it with a Mac, so I can't say for sure what the compatibility is.
About the printers -- if you have a printer over, say, 6 years old, the manufacturer may not have written drivers for the newer Mac operating systems. The major manufacturers of personal use printers all supply Mac drivers for their new printers. Offbrand manufacturers, particularly of those business targeted multifunctional networked copier-printers may not (OCE is one).
Mac and Windows users often defend their choices with religious fervor. The real renegades are the Linux users, who eschew both Apple and Microsoft. Remember "PC" stands only for "Personal Computer." Macs are personal computers, too.
P.S. -- the first windowed (point and click) operating system was developed by Xerox PARC (research division). Jobs and Wozniak saw a demo and were told Xerox wasn't planning to market it, so Apple was first to the plate and marketed primarily to education, not business. Again, Microsoft was late in the game :-)