iFixit gives new 21.5-in. iMac low repair score of 3 out of 10
Falls further behind Windows 7's 2009 rocket ride
New OS beats perception-plagued Vista even as it fails to match Windows 7
Retirement deadline for Microsoft's longest-lived OS is 'ticking time bomb,' says migration firm
Unlikely to restart x64 development in 2013
Leaves out iPad Mini from one-day sale
Patches 29 vulnerabilities, two-thirds rated critical
Tells customers to upgrade to OS X Mountain Lion if they want to continue using the chat-and-texting service after Dec. 14
