What operating system does the iPod use? Does it run MacOS X?
According to San Francisco Chronicle article “Little-known startup was behind iPod’s easy-to-use interface”, all versions of the iPod — except for the iPod shuffle — released prior to September 5, 2007 use an operating system derived from Pixo OS 2.1, originally designed for use with cell phones and other handheld devices. The iPod models introduced on September 5, 2007 — the iPod classic (6G/Original), iPod nano (3G/Fat), and iPod touch (Original) — as well as subsequent models use an operating system that derived from the version of MacOS X used on the iPhone.