Serial includes built-in support for cables and devices that are USB CDC (Communications Device Class) compliant or that use one of the following USB/Serial bridge chips:
FTDI FT232R, FT232B, FT232H, FT2232H, FT4232H, FT230X, FT231X, and FT234X
Silicon Labs CP2101, CP2102, CP2102N, CP2103, CP2104, CP2105, CP2108, CP2109
Prolific PL2303 device family
Texas Instruments TUSB3410
ASIX (formerly MOSCHIP) AX78120, AX78140, MCS7810, MCS7820, and MCS7840
Magic Control Technology MCTU232
The following devices are known to work well with Serial:
Sparkfun's Arduino Pro Micro 5V/16MHz and Arduino Pro Micro 3.3V/8MHz
Keyspan/Tripp-Lite USA-19HS
USB Modems that list CDC compliance - "soft modems" often are not compliant
Any other USB CDC compliant device
If you're looking to purchase a new serial cable for your Mac see Recommended Cables .