Hi!
I updated my OSX version to Yosemite, and since then, my Arduino UNO no longer appears in the list of ports of the IDE. I can only see the Mac's own bluetooth ports, but no "/dev/tty.usbmodemXXXX".
In the Mac System Report, when I plug it, I can see it as an "Unknown communication device".
I already followed these steps:
- install any port drivers needed. (VCP Drivers - FTDI)
- run this: sudo nvram boot-args="kext-dev-mode=1"
- Restart MAC
But no luck.
I tested the arduino in a PC with Windows XP and it works like a charm.
Any advice?
Thanks!
EDIT:
It appears now like an "Arduino UNO" in the system information, but still not listed in the Arduino IDE:
Arduino Uno:
ID del producto: 0x0001
ID del fabricante: 0x2341
Versión: 0.01
Velocidad: Hasta 12 Mb/s
ID de la ubicación: 0x14100000 / 9
Corriente disponible (mA): 500
Corriente necesaria (mA): Desconocido (dispositivo no configurado)
Are you using official product or a compatible board? Most of the problem are caused by the signature of the driver in Yosemite. You can use CodeBencer.cc as a replacement.
Yep, I'm not using the original Arduino. I have a compatible board.
I'll give https://codebender.cc/ a try!
Thanks 
The UNO doesn't use an FTI chip so that wouldn't help. I would try re-installing the IDE. Version 1.6.1 through 1.6.4 have been working fine on OS X 10.10.3 for me.
Hi All
I have a similar problem to mattogodoy in that I cannot select anything other than...
Serial ports
/dev/cu.Bluetooth-Incoming-Port
/dev/cu.Bluetooth-Modem
...from the Port menu. The "Serial ports" option does not appear to make any difference when I select it.
It does not matter what "Programmer" I choose, the above options remain the same in the Ports menu.
I am running a SODIAL Arduino NANO...I didn't know any better when I bought my first Arduino otherwise I would have likely gone through the Arduino store. Interestingly, I have had this baby working with my Mac before. I disconnected it a few days ago to try a different project but now I need to go back to the Mac and it don't see the NANO anymore. 
When I take at look at the /dev directory, I can see the devices mentioned above, but the...
/dev/tty.usbmodemXXXX
...is not there.
I have tried reinstalling the Arduino IDE by...
a) Removing the directory /user//Library/Arduino15
b) Downloading the IDE again from arduino.cc
When the IDE starts, it recreates the Arduino15 directory along with the preferences.txt file.
Not sure if this is a bug in the IDE? Perhaps it should be reported as such?
Any help would be greatly appreciated. Can I manually create the appropriate...
/dev/tty.usbmodemXXXX
...devices?
Cheers