Oh I hope someone can help me out of this headache. I run the msp430g2452 from my MAC (Yosemite), Ran fine after installing drives and all. Now suddenly the "Serial Port" has gone grey and I try to re install, reboot, re everything. No way I can connect again. I was playing with digital out and also in. Seemed like it was when I was trying to read the switch on pin5 that things went bad for me. I know many have had problems on a mac and I have looked intense on this Forum and other on the net. Now I try this. I hope someone can help. Greetings from Brazil and thanks any help. Peter