Chimp Cable

From The Apple Wiki
A Normal Chimp Cable (credit Mr White)

The Chimp Cable is a JTAG/SWD Cable capable of debugging CPFM 00 or 01 devices (EVT and DVT devices), or CPFM 03 (production devices) which demoted which have a USB-C port. The Chimp is used with the T2 and Apple Silicon Macs and USB-C iPads. They can be purchased from obscure markets.