First I tried closing the IDE, reopening and reloading the sketch. Didn't work.
Then I put 1.6.10 in the trash, and loaded 1.6.9, opened, uploaded the sketch, then changed the values to 100 milliseconds, and reloaded. Still didn't work.I don't know what else to try.
I did notice that the serial port shows a slightly different message than what's in the Arduino manual. Manual says it should say /dev/tty.usbmodem, but on my Mac it says /dev/cu.usbmodem. Also, there is only one choice, not two.
Finally, I don't see the rx and tx LEDs lighting up when I upload.
If there's nothing else to try, I'll be glad to talk with the Arduino folks........but there's no phone #, and they haven't responded to my request for help yesterday. Any other suggestions? Again, thanks for your patience, I really don't know what's wrong here.
I did notice one other thing. I haven't changed anything on the Arduino board, but is it possible somebody put the IC on upside down? I can't tell from the pictures in the manual where the notch should be. It's at the bottom of the board when the USB port is at the top. Is that correct? I would think these things are tested before they are verified and shipped, but one never knows.Thanks.
What where who ?Can you post a picture of the board ?Maybe add some other info like the IDE, OS etc ?
My Mac is using 10.11.1, El Capitan
You could also look up the Atmel pin-out and verify the ground and VCC to ensure you know its in correctly.Doubtful it was inserted wrong but stranger things have happened.
Best bet is remove all external wiring first and throw the blink sketch at it.If that works then you at least know where the problem probably is.
Sorry for coming in late.Failed to notice it was page 2...my own fault.Only saw the first post from P2...will try take more care.
Odd how so many macs are having so many issues right now.Anyone know what was the most stable IDE for the mac's
BN: Arduino/Genuino UnoVID: 2341PID: 0043SN: 9543731343435110E031