上周，我在一台运行 Mountain Lion 的新 Mac 上安装 Homebrew 时遇到了麻烦，我尝试添加 xcode 的命令行工具并安装 X11，并按照我在网上找到的大量其他方法操作。但这一切都让我不知所措，甚至到了我不知道自己做了什么的地步。因此，我决定将它视为一台新机器，清除硬盘并全新安装 Mountain Lion。
现在我已经完成了，如果我去磁盘实用程序验证磁盘权限，我会得到一大堆 xcode 和 X11 相关错误，我会运行权限修复，但似乎永远无法修复它们。有什么想法我可以做什么吗？最好再做一次全新安装吗？（全新安装有多干净，因为我不确定为什么会出现这些 X11 错误，因为我第一次擦除后没有再次安装它。。）
这是来自磁盘实用程序的日志（如下）注意我可以运行验证，然后修复，然后再次验证，是否会出现同样的问题？
Verifying permissions for “Macintosh HD”
Permissions differ on “usr/X11/bin/freetype-config”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/agvtool”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/ibtool”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/instruments”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/opendiff”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/xcode-select”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/xcodebuild”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions verification complete
Repairing permissions for “Macintosh HD”
Permissions differ on “usr/X11/bin/freetype-config”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Repaired “usr/X11/bin/freetype-config”
Permissions differ on “usr/bin/agvtool”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Repaired “usr/bin/agvtool”
Permissions differ on “usr/bin/ibtool”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Repaired “usr/bin/ibtool”
Permissions differ on “usr/bin/instruments”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Repaired “usr/bin/instruments”
Permissions differ on “usr/bin/opendiff”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Repaired “usr/bin/opendiff”
Permissions differ on “usr/bin/xcode-select”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Repaired “usr/bin/xcode-select”
Permissions differ on “usr/bin/xcodebuild”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Repaired “usr/bin/xcodebuild”
Permissions repair complete
Verifying permissions for “Macintosh HD”
Permissions differ on “usr/X11/bin/freetype-config”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/agvtool”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/ibtool”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/instruments”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/opendiff”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/xcode-select”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions differ on “usr/bin/xcodebuild”; should be lrwxr-xr-x ; they are -rwxr-xr-x .
Permissions verification complete
答案1
这些实际上不是权限错误——如果您查看详细的错误，例如Permissions differ on “usr/bin/xcodebuild”; should be lrwxr-xr-x ; they are -rwxr-xr-x .，差异在于第一个符号（lvs. -），它是项目类型，而不是权限标志。“应该是”类型，l表示符号链接，而-表示纯文件。在我的计算机上：
$ ls -l /usr/bin/xcodebuild
lrwxr-xr-x 1 root wheel 5 Jul 13 16:35 /usr/bin/xcodebuild -> xcrun
我已经有一段时间没有更新 Xcode 了，所以有可能应该在最新版本中可能是一个纯文本文件；或者可能是您安装的 Xcode 不知为何出现了乱码。无论哪种情况，权限本身都没有问题。如果出现问题，那一定是……不同之处。