Among the Apple (NASDAQ:AAPL) developer conference product rumors that didn't pan out: MacBook Airs with retina displays, an $800 MacBook Air, new iMacs, and (in the case of a speculative Jefferies note) the fabled Apple TV. There may be no better proof of why output from the Apple rumor mill needs to be taken with a large dose of salt. Apple shares finished down 1.6% after rallying early on, as disappointment over unrealized rumors set in. (more on AAPL)