iMac

• Apple's iMac is an ultra-thin all-in-one desktop computer, available in 21.5- and 27-inch sizes with an array of build-to-order upgrades. The iMac family was updated on October 13, 2015 to an all-Retina lineup for the 27-inch models, while the 21.5-inch lineup received its first 4K Retina display as a high-end option.

Retina MacBook Pro

• Apple's 13 and 15-inch Retina MacBook Pros are the company's top-tier portable machines. The 13-inch model received an update featuring a Force Touch trackpad on March 9, 2015, while the 15-inch model followed suit on May 19.

MacBook

• The 12-inch MacBook is Apple's newest notebook, even thinner than the MacBook Air, with an Intel Core M processor, a Retina display, USB-C, and a revamped trackpad. The MacBook launched on April 10.

MacBook Air

• Apple's 11- and 13-inch ultra-portable notebook computers received an update on March 9, 2015 with new Intel Broadwell processors, improved graphics, and Thunderbolt 2 connectivity. The 13-inch model also features new flash storage that is up to twice as fast as the previous generation.

Mac Mini

• Less powerful than other Apple desktop offerings like the iMac and the Mac Pro, the Mac mini is Apple's most affordable and compact desktop computer that's billed as a "bring your own display, keyboard, and mouse" device. It was updated on October 16, 2014, adding Haswell processors, 802.11ac Wi-Fi, PCIe-based flash storage in some models, and Thunderbolt 2.

Mac Pro

• Apple's radically redesigned pro desktop launched on December 19, 2013, bringing Intel's Ivy Bridge E Xeon processors, dual AMD FirePro graphics chips, and fast PCI Express-based flash storage.

MacBook Pro

Apple's non-Retina MacBook Pro line has been whittled down to a single 13-inch model that has not been updated since June 2012. Further updates are unlikely, as the company will likely simply discontinue the model as Retina MacBook Pro models have become more affordable and popular. The model received a $100 price cut in July 2014.