Have finally had time to try arduino with Mactel.
I 'm not very fluent with building from source so took a copy of the librxtxSerial.jnilib from processing 112 and found RXTXcomm.jar in the arduino package so replaced it with the one from processing.
Have run new setup serial script from Processing.
Using latest ftdi drivers for intel mac.
Arduino launches and lists serial ports under tools.
Have programmed arduino using Powerbook to send letter and flash led.
Processing receives transmitted letter from arduino, Zterm recieves letter and so does serial monitor in Arduino.
At first got lots of programmer not responding messages on attempting upload.
Edited prefs file serial.download_rate to 9600 and then it worked.
Currently programming with single reset press (although this is currently while arduino is only blinking led, not sending message to computer).
So for me it is currently working on a Mactel.