I am sorry if this sounds a bit rude, but it really is in a horrible state. It's UI is old and slow, it doesn't use the global menu system and it leaks memory all over the place. I'm sending this e-mail with the hope of someone seeing it and either taking a closer look at the OSX spice client or getting back to me to ask for more details.
Alternatively, if it's no longer supported, I request that some sort of indication be put about it on the spice website.
- Kind regards, presi300.