At WWDC20, Apple announced its next major shift for the Mac—away from Intel processors to Apple-designed silicon. It’s a big deal, and the first products for consumers will be available later this year.
In the meantime, Apple is making Developer Transition Kits available to some developers, so they can get started re-compiling and optimizing their Mac apps. The DTK is a Mac mini enclosure with an A12Z system-on-chip inside (the same as in the current iPad Pro). It has 16GB of RAM and a 512GB SSD, and a special version of macOS Big Sur and Xcode development tools.