Several people have been making an effort recently to get some of the altcoin wallets compiled for Mac OS X. Posts about them have been pretty scattered, so I'm starting this thread as a master list of Mac altcoin wallets, as well as a single place to discuss them.

This thread is meant for end users. We have a good Mac wallet development thread going here: https://bitcointalk.org/index.php?topic=205017.0

Here are the Mac altcoin wallets I know of. Let me know if I missed any. I'll update this list when I find or build more wallets.

DISCLAIMER: I can only vouch for the quality/security of the wallets I've built myself, but I've been using many of the wallets here for quite a while with no problems.

Built by maxpower: (Note that my wallets may not work on versions of OS X prior to 10.7 Lion)
Worldcoin: https://www.dropbox.com/s/99ldeiqithimt2k/Worldcoin-Qt-0.6.4.0-1-Mac.zip
Luckycoin: https://www.dropbox.com/s/846aeh8ys488u86/Luckycoin-Qt-0.6.3.0-Mac.zip
GLDCoin: https://www.dropbox.com/s/vphq2crmkcfbi41/GLDCoin-Qt-0.6.9.3-Mac.zip
USCoin: https://www.dropbox.com/s/vjwhgy99mlfp61k/USCoin-Qt-0.6.3.0-Mac.zip
Powercoin: https://www.dropbox.com/s/4jl5xi543vrzf90/Powercoin-Qt-0.6.3.0-Mac.zip
Digitalcoin: https://www.dropbox.com/s/3lrk5gb7cyegc4w/Digitalcoin-Qt-0.6.3.0-Mac.zip
BitBar: https://www.dropbox.com/s/2nwsdmes08sgmzf/BitBar-Qt-0.4.0-Mac.zip
HyperCoin: https://www.dropbox.com/s/55n9rvbyqo7un2x/hypercoin-qt-1.0.0.0-Mac.zip
GameCoin: https://www.dropbox.com/s/m3rudwqxidxmahk/Gamecoin-Qt-0.8.1.0-Mac.zip
Namecoin: https://www.dropbox.com/s/2wgpcdwpkrwjo3g/Namecoin-Qt-0.3.64-Mac.zip (from new Namecoin development at https://github.com/namecoin-qt/namecoin-qt, work still in progress, back up your wallet!)
AnonCoin: https://www.dropbox.com/s/5lch1jzv9uqql2t/Anoncoin-Qt-0.7c-Mac.zip
PhenixCoin: https://www.dropbox.com/s/dhhy4nc1tshqtaw/phenixcoin-Qt-0.6.4.9-Mac.zip
Doubloons: https://www.dropbox.com/s/l6l8sne9kqi9pwv/Doubloons-0.6.3.0-Mac.zip
Argentum: https://www.dropbox.com/s/m610nog9x7n2lig/Argentum-Qt-0.6.3.0-Mac.zip
Megacoin: https://www.dropbox.com/s/ksraxzd3k8t10pg/Megacoin-Qt-0.8.993-Mac.zip
BitGem: https://www.dropbox.com/s/1avio6m9rgg35sd/BitGem-Qt-0.4.1.5-Mac.zip
Bytecoin: https://www.dropbox.com/s/2ug7chnqmg8vyxb/Bytecoin-Qt-0.8.1-7-Mac.zip
StableCoin: https://www.dropbox.com/s/j3vd0gmvqr1uunb/StableCoin-Qt-0.6.3.0-Mac.zip
CryptogenicBullion: https://www.dropbox.com/s/c14yl5p1bf7tmzl/CryptogenicBullion-Qt-1.1.5.3-Mac.zip
Emerald: https://www.dropbox.com/s/llzh0ybxeo2czjh/Emerald-Qt-0.6.3.0-Mac.zip
BottleCaps: https://www.dropbox.com/s/ik3kjudg93k9xcn/BottleCaps-Qt-1.4.0.0-Mac.zip
Nibble: https://www.dropbox.com/s/0eptl596hxnjpl0/nibble-qt-0.6.5.2-Mac.zip
Infinitecoin: https://www.dropbox.com/s/doqwnrvhnrtgt2g/Infinitecoin-Qt-0.6.3.0-Mac.zip
Freecoin: https://www.dropbox.com/s/gfwdxoigz1r8i8s/freecoin-Qt-1.0.0.0-Mac.zip
Starcoin: https://www.dropbox.com/s/hv7b5bfhqgah6hd/starcoin-qt-1.0.0.0-Mac.zip

Built by crendore:
YACoin: http://waspdigital.com/AltCoinQt-OSX/YaCoin-Qt.dmg

Built by jrlepage:
Mincoin: https://dl.dropboxusercontent.com/u/7405118/MinCoin-Qt_v064.zip
HyperCoin: https://dl.dropboxusercontent.com/u/7405118/hypercoin-qt.zip

Built by bushstar:
Feathercoin: http://www.feathercoin.com/dl/feathercoin-mac.zip
FRANKO: https://www.dropbox.com/s/6b0vt27fbezsmao/franko-qt.zip?v=1mcis

Built by twobits:
Devcoin: https://www.box.com/s/ntna8dibxek351s42fxu
Ixcoin: GUI: https://www.box.com/s/d4g2d4lq2jez7jcwj8na | Daemon: https://www.box.com/s/a1y9kcalxxksnxkldysa
Namecoin: GUI: https://www.box.com/s/tf8v3kzrdcawn5yfc1om | Daemon: https://www.box.com/s/ouqsqb5xcw88g0qmaljl

Built by coblee:
Litecoin: https://github.com/downloads/litecoin-project/litecoin/litecoin-0.6.3c-macosx.dmg

Built by Kosmatik:
OneCoin: https://docs.google.com/file/d/0B58-u3zKUlLdSkVGekxBbEZHSW8/edit?usp=sharing

Built by shitscared:
Fastcoin: http://www.fastcoin.ca/downloads.html
GIL: https://www.dropbox.com/s/n04pmfmxb7todck/Gilcoin-Qt.dmg.zip

Built by unknown builder(s):
Elacoin: https://github.com/elacoin/elacoin/tree/master/mac-binaries
Noirbits: https://mega.co.nz/#!v84CDSCY!ZMrvWhmEP4ahVKsRH9dBxEc4G8w76-KbwyB0UEsVyUU
Spots: https://app.box.com/s/gw7hpy7xug18wr3rmo9d
Novacoin: http://sourceforge.net/projects/novacoin/files/