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[on:]

Hi All

Can anyone shed some light on this problem before I give up and work on a Windows machine.

I have suddenly lost the ability to connect to my Arduino Uno with my Mac. I am running OS X 10.8.2, I have turned Bluetooth off completely and removed all Bluetooth connections. I have re-installed the FTDI drivers over and over again but the serial port does not show up in the IDE. I have changed USB ports, trying both hub connections and directly from the back of the Mac. I have restarted the Mac countless times but all to no avail.

Is there something I'm missing? Is there some little trick I should know about?

Any help here would be appreciated.

[Reply #1 on:]

Bluetooth has nothing to do with it.
FTDI drivers don't matter on a Uno (if it is genuine).

What does System Information (In Applications -> Utilities) say under USB when the Arduino is connected?

[Reply #2 on:]

I have the same problem, the error message is :
"the serial port is already in use, try to close other application that may use it"

[Reply #3 on:]

exactly:
processing.app.SerialException: Serial port '/dev/tty.usbmodem5d11' already in use. Try quiting any programs that may be using it.

But it is not true !!

[Reply #4 on:]

No, your problem is completly unrelated.  Not sure how you define "not showing up" and "already in use" as he same problem.

Try these fixes for serial port in use:
http://www.cmiyc.com/blog/2012/10/08/arduino-fixing-serial-port-in-use/

[Reply #5 on:]

thanks. I finally did find somebody having the same problem with serial port af my Mac. my trouble still is present, as I am new here and don't understand the solution. Terminal??? could you please tell me exactly how to close the ever open ports?

[Reply #6 on:]

Terminal??? could you please tell me exactly how to close the ever open ports?

I give directions in the link above.

Terminal is the command line utility. It is available in Applications -> Utilities

The most common issue is the /var/lock section.

[Reply #7 on:]

Sorry, I dont understand.
maybe my english is not good enough or I am an to unexpierenced programmer?