Congratulation!But: still open: how did it work in Yosemite without having installed the driver ...
I had the same problem of no Mac port to choose for the MEGA 2560. (MAC OSX, 10.8.5 )SOLUTION:1) Fired the Arduino 1.0.5 , Connected the Arduino to a USB port1) I went to tools/BOARD and choose (don't ask me the rationale) another BOARD model which has the choice of serial ports2) went to tools/SerialPorts and selected /dev/tty.usbmodem6213) went back to tools/BOARD and selected the right one (i.e., MEGA 2560). Everything is working…Don't ask me why….
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