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Stuff System Admins Talk About
Apple not contentwith being the bigest kid on the block, wants to knock out is competitors, not through innovation, but through legislation.
Apple is trying to get HTC phones and tablets banned in the US.
Apple has changed the standard 4 wire wiring for their hard-drives in the new iMac from the industry standard to a proprietary 7 wire configuration.
The fan control circuitry for the new iMac uses firmware present in the drive. If the hard-drive is changed for a non apple one, the chassis fan spins at maximum velocity.
Apple have a history of making things difficult to upgrade with 3rd party components.
Article: MacSales