The serial port is
Helpful Hints for Macintosh Computers
Special AT Command Settings for Macintosh
For operation with Macintosh computers, you may use the factory default settings with one exception. You must set the modem to ignore the DTR signal as follows:
Type:
AT&D0<enter> (set modem to ignore DTR)
AT&WZ<enter> (saves the settings to power- up profile)
Macintosh Serial Port
When you connect your modem to a Macintosh computer, make sure the cable is a hardware handshaking type. These cables are readily available. Macintosh Lisa model 128 and 512 don't have hardware handshaking. The serial port on these (very outdated) models is provided as a
Mac Software Tips
All terminal programs which make use of the hardware handshaking feature can be used on the Apple Macintosh. Such programs are