Apple’s iMac Pro launched seven years ago today, offering a high-end all-in-one desktop machine to bridge the gap between new Mac Pro models.
In April 2017, Apple uncharacteristically apologised for its approach to the Mac in recent years and pre-announced it was working on a “completely rethought” Mac Pro with a modular design, a new pro-level iMac, and a new high-end external display. At WWDC that year, Apple unveiled the iMac Pro, after years of rumors about a “Pro” iMac. The iMac Pro sought to placate many of Apple’s discontented professional Mac users, coming around four years after the launch of the controversial “trashcan” Mac Pro, but two years before the current Mac Pro design, which returned to a modular tower design.
Apple presented the iMac Pro as “the most powerful Mac ever made.” It featured 8-, 10-, 14-, or 18-core Intel Xeon processor options, a 5K display, AMD Vega graphics, ECC memory, and 10 Gigabit Ethernet, with a starting price of $4,999. It was also the first Mac to contain a custom T2 chip, as well as the first desktop Mac to be available in Space Gray. While it did not have a slot to easily access the memory like the 27-inch iMac, the processor, memory, and storage were not soldered in place and could easily be removed if the display was disassembled.
Read more at MacRumors.com

