Mavericks - avrdude: stk500_recv(): programmer is not responding

Hello all,

I know this topic has been discussed in depth already in many other forum posts, but I have not had any success with any of the proposed solutions so far, so I thought I would ask to see if maybe something has changed.

I recently upgraded my Mac from Snow Leopard to Mavericks (v10.9.5). As many of you probably already know, Mavericks causes the following error when uploading a sketch:

avrdude: stk500_recv(): programmer is not responding

My understanding is that the issue derives from the fact that Apple has released their own FTDI drivers.

I have tried to disabled this driver with the following (often recommended a solution):

cd /System/Library/Extensions/IOUSBFamily.kext/Contents/PlugIns
sudo mv AppleUSBFTDI.kext AppleUSBFTDI.disabled
sudo touch /System/Library/Extensions

And then restarted my computer.

I then reinstalled the VCP FTDI driver.

After doing this I can see the /dev/tty.usbmodem1421 device, but I still get the above error when uploading a sketch.

"ls /System/Library/Extensions/IOUSBFamily.kext/Contents/PlugIns" shows AppleUSBFTDI.disabled

"ls /System/Library/Extensions/" shows FTDIUSBSerialDriver.kext

Has there been any changes since this solution was originally posted that I should be aware of?

I also have the PL2303 Prolific driver installed, could this be causing a problem?

I should also add that I have verified that my Arduino and usb cable are not the problem, by uploading a sketch successfully from another machine.