In my case, after the initial attempt at upgrading to 1.62 via sysex, my machine was totally nonreponsive. On powerup, there were no lights at all. It appeared to be totally dead. However, by following the instructional pdf for the usb update, I was able to see a response from the Octopus in the terminal software. So, your Octopus may look nonresponsive, but you should be able to get it going by performing the usb update. The update is easy if you follow the instructions exactly.
I was not able to update with my mac, but the update works great with a windows machine, so you should be fine.
Post edited by: Oxix52, at: 2009/09/13 19:58