La siguiente tabla lista algunos errores devueltos por el sistema Mac OS. Generalmente no es posible recuperarse de estos errores.
| Código | Descripción |
| 4 | Zero divide |
| 15 | Segment Loader Error: 4D failed in loading one of its own code segments. |
| You must allocate more memory to 4D. |
| 17 a 24 | A system package is missing. Check if your system directory has been correctly installed |
| 25 | Out of memory |
| You must allocate more memory to 4D. |
| 28 | Stack has moved into the application heap. |
| You must allocate more memory to 4D. |
