I've already fixed a few packaging problems with QGIS 2.2. There is one problem with Mavericks: if you have installed the Qt frameworks, QGIS will crash. I'm looking into it, for now uninstall Qt if you want to run QGIS on Mavericks.
It was a long run for this one. A good solid system. But it's time to retire it. I'm upgrading Macs at my job now to Mt Lion, so I have no need to support Snow Leopard.
I'm sorry to all the people still holding onto Snow Leopard. I realize that it still makes up a significant percentage of OS X users, but it has been falling slowly but steadily over the past year or so.
My philosophy is to support what Apple supports. This is mainly shown by what systems get regular security updates, and Snow Leopard hasn't seen a security update since Mavericks was released last October. Though there hasn't been a purely "security" update for Lion+ since then, they have received Safari security updates that Snow Leopard did not get.
It's a common complaint that Apple has no official OS X support policy. I think they do, indirectly. Apple is a hardware company, so OS X support is implied by their hardware support, which does have a policy. They support Mac hardware for 5 years for everywhere except California which requires a 7 year support cycle. Without California, all supported 5 year-old Macs can run Mavericks. Counting 7 year-old Macs, that goes back to Lion (but that won't last long – next year 7 year-old Macs will all support Mavericks, skipping Mt Lion).
Fixed missing library that affected plugins in QGIS.
… 2.0-7 (for real this time)