It’s been almost two years since Apple updated the iMac. Was it worth the wait? When Apple finally upgraded the iMac this month, it put in new Intel Kaby Lake processors to give the machine a speed boost. We tested the $1499 21-inch iMac with a 3.4GHz Core i5 processor, and found that the new iMac was about 8 percent faster than its predecessor, a 2015 model that had a 3.3GHz Broadwell Core i7 processor.That may not seem like much of an increase, but at least the gains over even older iMacs from 2014 and 2013 are much more satisfying. We’re talking in the 20 percent range. The 2017 iMac comes with 8GB of memory, but good news: it’s no longer fixed memory. You can add more RAM to later. That said, it’s not really an upgrade you can do yourself, as Apple recommends bringing in the iMac to an Apple store. Apple also improved the display. It’s brighter than before, 43 percent brighter. And on the iMac we tested, the display is powered by a 4GB Radeon Pro 560 video card. The iMac comes with a wireless Magic Keyboard that uses a Lightning connector for charging. And Apple even includes a Lightning cable, you can never have too many of those around. To connect hard drives, printers, and other stuff, you can use the two Thunderbolt 3 ports or the four USB 3 ports on the back.In all, the 2017 iMac continues the excellence that is the iMac. Was it worth the wait? We think so, despite the fact that the speed bump isn’t as big over the 2015 model as we’d like. Still, if you’ve been waiting for years to buy an Apple desktop, rest assured, this one won’t let you down. .