I've been patiently waiting for the past 9 months on Yosemite's release, eager to take advantage of all the new features. Imagine my disappointment when after the install I found that some of the best features of Yosemite are not available on my late 2011 MBP. No AirDrop from mobile devices to MBP, no Continuity, no Instant Hotspot and more. While I'm extremely frustrated with this fine print revelation that was only made known after Yosemite went live, I really want to know why. Is this just a case of there's some hardware in newer Macs that is not available in older Macs, or is this marketing, Apple locking out older systems in order to encourage them to upgrade? Does anyone know?