Re: network config for Mac OSX 10.4.11
Yes, more info would have been helpful. Under the tools menu, board->Arduino Uno and serial port->/tty/dev/tty.usbmodem1811. I've also tried with the other usb port and get a port id where the last 4 digits are 1911.
The LED activity is green power LED on always, "L" LED is constantly blinking at about 1 sec intervals all the time. When trying to upload the blink 0022 sketch, the "L" LED blinking rate varies as it tries to upload, there is occasional activity of the "RX" LED, 2 intervals of 2-3 blinks, but nothing from the "TX" LED.
I posted this same question to the Arduino.cc forum, and the one reply I got was that there is a problem with the drivers in OS X 10.4.xx, and that no solution has been found yet.