Apple Requiring Developers to Return DTK Mac Minis by March 31 Friday February 26, 2021 2:57 pm PST by Juli Clover Apple today sent out emails to developers who are in possession of a Developer Transition Kit, asking them to return the machines by March 31. The Developer Transition Kits are Mac minis with A12Z chips that Apple provided for development purposes ahead of the release of the M1 Macs. Apple in the emails provided developers with shipping instructions, and plans to begin collecting the DTKs starting next week. The DTKs featured 16GB RAM, a 512GB SSD, two USB-C ports, two USB-A ports and an HDMI 2.0 port in addition to the A12Z chip, which was first used in the 2020 iPad Pro models.