Hey Jim,
The Mac version seems to be incorrectly signed, such that Gatekeeper refuses to open it. Are you signing the packages with a developer ID certificate? Gavin put a fair bit of effort into getting Bitcoin-Qt signed and working with Gatekeeper, it'd be hard to downgrade that now, especially as the usual right click+open trick doesn't work on signature-failing apps. You have to disable Gatekeeper entirely.
Maybe because I installed an Oracle JVM, but I see blurry text (not retina compatible). There's a simple hack that can fix this, see here:
http://stackoverflow.com/questions/13003511/eclipse-juno-and-retina-resolutionIt won't do much for the artwork but will fix the text, which is the most important thing.
Should the help documentation talk about protobuf vs serialized? That seems a bit nerdy.
Otherwise seems to be working OK! Will continue testing.