https://www.techradar.com/news/imac-2018

It’s not unlikely, given Apple’s track record, that we’re going to see a handful of iMac 2018 models that update the all-in-one to the latest processors and operating system at some point in the year.

Though the Cupertino tech giant skipped a year back in 2016, the iMac has generally been an annualized property. Unfortunately, however, the only evidence we have that the iMac is even getting a refresh this year lies in its history of garnering updates in the past.