This topic is a feature request for Graphite counterpart for Mac OS and not about running Mist in Mac OS.
Anyway, I've just tested Icenium Mist on 13' MacBook on Google Chrome v. 30.0.1599.69 and Safari 6.0.5 (8536.30.1) and everything behaved and worked as expected. I would appreciate if you check whether you're running latest version of those two browsers and if you're still having problems provide us with screenshots that show the unexpected behavior.
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