| Colour | Mac keyboard pin | Teensy pin | Meaning |
|---|---|---|---|
| gray | 1 | GND | GND |
| purple | 2 | PE7 (INT7) | KBD1 (Keyboard Clock) |
| blue | 3 | PB0 | KBD2 (Keyboard Data) |
| green | 4 | +5V | +5V |
KBD2 (data) could be on PE4/5 (INT4/5) if an interrupt is required, but that will require more soldering. Otherwise any other pin should suffice.
| Colour | Mac mouse pin | Teensy pin | Meaning |
|---|---|---|---|
| green | 1 | GND | Ground |
| purple | 2 | +5V | +5 Volts |
| blue | 3 | GND | Ground |
| black | 4 | PD0 (INT0) | X Quadrature 1 |
| orange | 5 | PD1 (INT1) | X Quadrature 2 |
| n/c | 6 | N/C | No Connection |
| gray | 7 | PE6 (INT6) | Button (Ground when pressed; needs pull-up) |
| white | 8 | PD2 (INT2) | Y Quadrature 1 |
| yellow | 9 | PD3 (INT3) | Y Quadrature 2 |