iMac (Late 2012)

The Late 2012 iMac marked one of the most dramatic industrial design shifts in the machine's history. Apple shaved the edge down to a razor-thin 5mm taper, giving the all-in-one a startling profile from the side while retaining a bulge at the rear to house the logic board and cooling. To achieve this, Apple abandoned the internal optical drive entirely and switched to friction-stir welding to fuse the aluminum enclosure, a manufacturing technique borrowed from aerospace. Inside, Ivy Bridge Core i5 and i7 chips clocked from 2.7 to 3.4GHz brought a modest but real performance bump over the 2011 Sandy Bridge generation, paired with Nvidia GeForce GT 640M/650M or GTX 675MX/680MX graphics depending on configuration. The signature innovation was Fusion Drive, Apple's clever hybrid storage scheme that paired a small SSD with a traditional hard disk and used software to automatically migrate frequently accessed files to flash storage, delivering much of the snappiness of an SSD at hard-drive prices and capacities. Apple also laminated the display glass directly to the LCD, reducing reflections and internal glare noticeably compared to prior iMacs. Reviewers were largely smitten with the design and screen quality, though some noted the thin edge was largely a cosmetic flourish since the machine was no thinner where components lived, and the lack of a user-serviceable interior (RAM was accessible on the 21.5-inch only with difficulty, the 27-inch remained more open) drew some criticism from the tinkering crowd. This generation is remembered fondly as the last "classic-proportioned" iMac before the 2014 Retina 5K redefined the line, and as the machine that introduced Fusion Drive, a technology that would persist for years afterward. It represented Apple doubling down on desktop all-in-ones as objects of industrial design as much as computing tools, a philosophy that would only intensify with later Apple Silicon iMacs.