Steam gives me the error, "Steam requires that ~/Library/Application Support/Steam be created on a case insensitive filesystem." or "Steam requires that ~/Documents/Steam Content be created on a case insensitive filesystem."
Steam does not currently support case sensitive filesystems.
If you wish to use Steam please make sure of the following:
For users that wish to use symbolic links to get your case-sensitive system to work you can refer to the following thread here.