$PATH变量也受制于path_helper，它反过来利用/etc/paths文件和/etc/paths.d中的文件

更详细的描述可以在PATH和Leopard(2008-11)的其他环境问题中找到。

我的个人实践是.bash_profile。我在这里添加路径并附加到Path变量，

GOPATH=/usr/local/go/bin/
MYSQLPATH=/usr/local/opt/mysql@5.6/bin

PATH=$PATH:$GOPATH:$MYSQLPATH

之后，我可以有个人的路径通过echo$ GOPATH, echo$MYSQLPATH或所有通过echo$ Path。

对于Bash，尝试将环境变量添加到文件/etc/profile中，以使它们对所有用户可用。不需要重新启动，只需启动一个新的终端会话。

虽然这里的答案并不是“错误的”，但我还要补充一点:永远不要在OS X中改变影响“所有进程”的环境变量，甚至在shell之外，也不要影响给定用户交互运行的所有进程。

In my experience, global changes to environment variables like PATH for all processes are even more likely to break things on OS X than on Windows. Reason being, lots of OS X applications and other software (including, perhaps especially, components of the OS itself) rely on UNIX command-line tools under the hood, and assume the behavior of the versions of these tools provided with the system, and don't necessarily use absolute paths when doing so (similar comments apply to dynamically-loaded libraries and DYLD_* environment variables). Consider, for instance, that the highest-rated answers to various Stack Overflow questions about replacing OS X-supplied versions of interpreters like Python and Ruby generally say "don't do this."

OS X is really no different than other UNIX-like operating systems (e.g., Linux, FreeBSD, and Solaris) in this respect; the most likely reason Apple doesn't provide an easy way to do this is because it breaks things. To the extent Windows isn't as prone to these problems, it's due to two things: (1) Windows software doesn't tend to rely on command-line tools to the extent that UNIX software does, and (2) Microsoft has had such an extensive history of both "DLL hell" and security problems caused by changes that affect all processes that they've changed the behavior of dynamic loading in newer Windows versions to limit the impact of "global" configuration options like PATH.

不管“蹩脚”与否，如果您将这些更改限制在较小的范围内，您将拥有一个更加稳定的系统。

做的事: vim ~ / . bash_profile 文件可能不存在(如果不存在，您可以直接创建它)。 输入并保存文件: 导出路径= $路径:YOUR_PATH_HERE 运行 源~ / . bash_profile

直到和包括OS X v10.7 (Lion)，你可以设置它们:

~/.MacOSX/environment.plist

See:

https://developer.apple.com/legacy/library/qa/qa1067/_index.html https://developer.apple.com/library/content/documentation/MacOSX/Conceptual/BPRuntimeConfig/Articles/EnvironmentVars.html

对于终端中的PATH，您应该能够在.bash_profile或.profile中设置(尽管您可能必须创建它)

对于OS X v10.8 (Mountain Lion)及以上版本，您需要使用launchd和launchctl。