Uno won't connect to mac

Development Tools IDE 1.x
1

Gang... Let me say, this is my first post. I've been reading and reading about these things and well jumped into the pot

now... the most simplest thing won't work

I have a china UNO and it has the surface mount CPU. It say MEGA 238P.

So, connected to the mac directly to a USB port... NO hub

There are two LEDs on the board. One say "ON" and the other says "L"

when power is applied (plugged into the USB port) the power LED comes on, and LED L blinks.

When I try to upload the blink program, I get this:

Arduino: 1.6.9 Hourly Build 2016/03/16 07:12 (Mac OS X), Board: "Arduino/Genuino Uno"

Sketch uses 1,324 bytes (4%) of program storage space. Maximum is 32,256 bytes.
Global variables use 15 bytes (0%) of dynamic memory, leaving 2,033 bytes for local variables. Maximum is 2,048 bytes.

Sketch uses 1,324 bytes (4%) of program storage space. Maximum is 32,256 bytes.
Global variables use 15 bytes (0%) of dynamic memory, leaving 2,033 bytes for local variables. Maximum is 2,048 bytes.
avrdude: ser_open(): can't open device "/dev/cu.Bluetooth-Modem": Resource busy
ioctl("TIOCMGET"): Inappropriate ioctl for device
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

I notice on the tools that the serial is grayed out.

I've tried several combinations, but no joy

I wonder why the "L" LED is blinking?

Do I have an issue with the board, or the connection?

Sure could use some help

thanks...

2

Hi
If the ports are grayed out it means it does not have the drivers to talk to the chip that converts the USB to a Serial port.
Not sure if your board has an FTDI chip to do this job so read this How to Install FTDI Drivers - SparkFun Learn or post a photo of your board

3

Well poop! That didn't work. I downloaded the driver. I'm using 10.10 OS on the mac

Now, this is interesting.

I have a arduino I purchased from Radio shack a while back. Found it last night.

Connects to the mac without a hitch.

Unplug it and plug in the Chinese clone and no connection to the board

with the genuine article, I see the serial port is still grayed out, but I have this:

dev/cu.usbmodem411

when I connect the clone, that is no longer an option, instead I get:

dev/cu.bluetooth modem or dev/cu.bluetooth incoming port

What gives?

Any ideas?

Mike