Running Mac OSX 10.6 on a MacBook Pro, received two boards today: Uno, and Nano 3.X (Uses ATMega328). Uno works fine, but can't find serial device for nano.
Searching forum, main problem seems to be failure to install FTDI driver, as found here: http://www.ftdichip.com/Drivers/VCP.htm
But I did this, and still no luck. I installed version 2.2.17 of the VCP for the Intel Mac, and even tried both the 32-bit and 64-bit versions (removing /System/Library/Extensions/FTDIUSBSerialDriver.kext between each trial). I tried backing up to 2.2.16. I tried restarting the computer. I tried re-installing the Arduino IDE after the FTDI driver was in place. I tried various combinations of starting the IDE with and without the device plugged in. I tried different USB ports.
No matter what I've tried, I get no /dev/usb devices appearing (they do when I plug in the Uno). I have not tried every ridiculous combination of the above options. But I'm running out of steam.
One potential red flag (or red herring) is that the de-installation instructions for the VCP driver involve removing not only the FTDIUSBSerialDriver.kext file, but the /Library/Receipts/ftdi* files. But I have no such files in Receipts. Was the installation unsuccessful, despite the big green check mark and happy beep at the end (and message that installation was successful)? I doubt this is the problem, but geez, I've been through the wringer on this one.
One other possible anomaly: the Uno default program had the LED on a slow blink pattern. The Nano blinks four times quickly and thenpauses briefly, repeating each second. Is this some indication that the wrong program is loaded or some other weirdness? May be perfectly normal, but I'm casting about for any differences between the working Uno and recalcitrant Nano.
Thanks for any help!