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Because of the pixels? This OS was before my time so I can't really see your objection here.

*I exaggerate a little, but I really didn't have a computer until right around this time, and it wasn't a mac.

Probably because it is running on a Pentium? Perhaps it is an emulator or a Linux theme?

Check out the root of URL for this image (http://winmac.emuunlim.com/).