brew doectorして知ったんですが、Mac OS Xデフォってcase-insensitiveだったんですね・・・。どうもAdobeとかSteamのゲームとかインストール時に文句言われるなあとかおもってたんですが・・・。


% brew doctor
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry and just ignore them. Thanks!

Warning: The filesystem on / appears to be case-sensitive.
The default OS X filesystem is case-insensitive. Please report any apparent problems.