在我的Mac OSX Yosemite上。
error: unable to unlink old 'bin/brew' (Permission denied) error: unable to unlink old 'share/man/man1/brew.1' (Permission denied)
sudo brew update
MacBook-Pro:bin$ sudo brew update Password: Error: Cowardly refusing to `sudo brew update` You can use brew with sudo, but only if the brew executable is owned by root. However, this is both not recommended and completely unsupported so do so at your own risk.