Free serial terminal program? NOT ZTERM


macrumors member
Original poster
Sep 13, 2005
Columbus, OH
I'm looking for a ZTERM replacement. Anything out there? Seems this area is notably empty in the Mac arena...only thing I've really found was ZTERM which i've been using for now...


macrumors newbie
Mar 7, 2011
You can connect via the command line

Use the built in Unix program called: screen

Open Utilities folder, open Terminal.
You'll see a black terminal window.

You can see some of the screen commands by typing: man screen
That will pull up the sceen manual pages.

I connect to my USB serial device with the command:

screen /dev/tty.usbserial 9600

This also works:

screen /dev/tty.PL2303-0000201A

The actual tty name may change depending on what kind of USB Serial Adapter you are using.


macrumors newbie
Jan 8, 2008
San Juan, Puerto Rico
I'm still using ZTerm albeit much less now that everything has telnet and ssh. I found that just being patient and tweaking the character spacing time and such that it works just as well as putty that is my client of choice in windows.