Over the last few months, an increasing number of references to AMD processors have been uncovered in macOS Catalina code, starting with the 10.15.2 beta in November and now continuing in the 10.15.4 beta.
Given that Macs currently use Intel processors, the references are naturally prompting speculation that perhaps Apple plans to release Macs with AMD processors, but this is unconfirmed as of yet. Apple does rely on AMD for graphics in select MacBook Pro, iMac, iMac Pro, and Mac Pro models.
Many of the references contain codenames of AMD APUs such as Picasso, Raven, Renoir, and Van Gogh. APU or Accelerated Processing Unit is AMD’s marketing term for a CPU and GPU on a single chip.
Read more at MacRumors.com