Apple's newly refreshed MacBook Air and 13-inch MacBook Pro models no longer support running Windows 7 with Boot Camp, according to Apple's Boot Camp support document. Boot Camp on the new notebooks only works with Windows 8 or later, so it is impossible to use Boot Camp to install Windows 7 on the machines.

For those unfamiliar with Boot Camp, it is Apple's software designed to allow Mac users to install Microsoft Windows on their machines.

Apple also dropped Windows 7 Boot Camp support in the 2013 Mac Pro, suggesting the software would cease to be supported by future Macs, but Macs released in 2014 continued to offer Windows 7 installations. The 2014 MacBook Air and the 2014 MacBook Pro will be the last Apple notebooks that support Windows 7.

Though Boot Camp no longer supports Windows 7, the operating system can continue to be used on these newer machines with virtualization software like VMware Fusion and Parallels.

It is not surprising that Apple has opted to phase out support for Windows 7, given its advanced age. Windows 7 first became available to the public in 2009 and was followed by Windows 8 in 2012. Despite being six years old, Windows 7 continues to be the most heavily used Windows-based operating system.

Mac users were not happy with Apple's decision to cease Windows 7 support in the Mac Pro, and it's likely the dropped support in the new MacBook Air and MacBook Pro will also be met with resistance. Windows users have not yet embraced Windows 8 due to both its cost and its interface, which deviated significantly from the design of Windows 7.

Windows 10, coming later this year, may encourage stalwart Windows 7 users to upgrade, as it melds Windows 7 design elements with Windows 8 design elements for a happy medium that might satisfy a wide range of tastes. Windows 10 pricing has not been unveiled, but it will be a free upgrade for Windows 7, 8, and 8.1 users.

(Thanks, Daniel!)