I'm running a iMac with Yosemite 10.10.5. I have a new Arduino Uno with USB port. And I'm running Arduino 1.6.5.
I connected the Arduino to a USB port on the Mac. The green power light lit up. The 13 light lights but is not flashing. So I went to File>Example>Basics>Blink to upload the sketch for the flashing light. I compiled the file without issue. And when I attempted to upload I received a serial port error. I went to Tools>Port to see what port was being used and the selection is grayed out, I can't even select it. So I checked to see which board was selected in the same Tools menu and I have Arduino/Genuino Uno selected.
After much research I found the site for the FTDI download. Downloaded and installed it, restarted the Mac. Still no joy. Oh, and I've attempted same on different USB ports as well.
Any suggestions or advice?
Update... I attempted the above sans uploading a new USB driver on my MacBook Pro; running 10.10.5 and using Arduino 1.6.3. I have Arduino Uno selected in Tools>Board, and Serial selected in Tools>Port. I get the following error: ...can't open device "/dev/cu.usbmodem1421" : No such file or directory.
Thanks,
Loch