I just picked up my first Arduino Mega 2560 the other day. Hooked it up to my Mac Pro and made my first sketch - basically a blinking pattern with the onboard pin 13 LED (tinkered with the simple Blink example a bit).

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Tiny Tty Mac Os X

Today, I go to tinker with it some more, and the long list of serial ports is gone, and only 4 bluetooth options are there (cu.Bluetooth-Modem, cu.Bluetooth-PDA-Sync, tty.Bluetooth-Modem, tty.Bluetooth-PDA-Sync).

The Mega is still running my sketch both when plugged into the USB cable as well as when powered via the battery pack (8xAA). I tried launching the Arduino program with and without the hardware connected. I tried several different USB ports (all of which work with USB flash drive, mouse, kbd, etc), and still no joy. I even tried re-booting the Mac to no avail.

If I try to upload my new sketch using the current settings, I get the following error message in a dialog box:

Mac OS X - Use the command ls /dev/tty.usbmodem. Linux - Use the command ls /dev/ttyACM. Terminal Applications¶ Details¶ Communication over the USB Serial port simply uses the standard Serial Interface, specifying the internal (USBTX, USBRX) pins to connect to the Serial Port routed over USB.

Serial port /dev/tty.usbmodem1d11 not found. Retry the upload with another serial port?

And, it shows me the option to pick one of the Bluetooth choices listed above.

If I try to launch the Serial Monitor (which launched just fine yesterday), I get the following error message below the current sketch:

Serial port '/dev/tty.usbmodem1d11' not found. Did you select the right one from the Tools > Serial Port menu?

Not sure what to try next. It seems that the Mega is working just fine, but for some reason the Mac USB/modem drivers/definitions are gone?

EDIT: borrowed my wife's Vista laptop and installed the software/drivers and I am able to load sketches to the Mega just fine. So, it appears that the board and cable are fine. And, since the various USB ports work just fine for other USB devices on the Mac Pro, it appears to be a driver/software issue.

Tiny Tty Mac Os Catalina

Any Mac users know how to get the usbmodem options back?

Mac Os Catalina

EDIT 2: realized I didn't include what my Mac is running...Mac Pro (2x Quad-Core Intel Xenon)Mac OS X v10.6.8 (all updates current)More than enough RAM and HDD spaceNo Bluetooth (as far as I am aware)