I too have upgraded to OSX 10.10 and can no longer run OLS Client. Because of security requirements at my location, I cannot go back to Java SE6, so that is not an option. In addition, required security updates of other Java applications now require Java 8.
PLEASE come up with a way to fix this on OSX 10.10 so OLS client can run on Java 8, as I have come to be very dependent on OLS & OLS client.
I downloaded the latest files, and found what I needed, but still had to borrow a Windows computer to reload the firmware. At any rate, it now seems to be working with the latest versions, and self test passes.
But when using Jawi's client, the "show device metadata" button comes up blank. In addition, using test mode and connecting to the wing connector does not give the correct test pattern, so I don't think I'm quite there yet. Suggestions?