zcash4mac is a 100% GUI, signed Mac App that @zab and I have been working on. It bundles my Mac port of zcashd, the ZCashSwingUI wallet by @vaklinov with Mac-specific customizations by @zab, the needed jre, downloads the proving key via the GUI, creates the config file if you haven't ever run zcash on your mac (and respects the one you have if you've been running my command-line Mac port!), and verifies the proving key on each launch.
Get it now at: https://zcash4mac.com
Donations in BTC to: 1LiLnWfLP3fuxK1jws3PjZf7Lfzn6kuhTy
Fiat donations to my email above
ZEC addresses for donations to myself and @vaklinov are in the addressbook for zcash4mac