添加路径变量到OS X Lion

这是非常直接的，对我来说很有用，在终端:

$echo "export PATH=$PATH:/path/to/whatever" >> .bash_profile #replace "/path/to/whatever" with the location of what you want to add to your bash profile, i.e: $ echo "export PATH=$PATH:/usr/local/Cellar/nginx/1.0.12/sbin" >> .bash_profile 
$. .bash_profile #restart your bash shell

类似的回复在这里:http://www.mac-forums.com/forums/os-x-operating-system/255324-problems-setting-path-variable-lion.html#post1317516

建议在设置任何环境变量之前检查默认的终端shell，通过以下命令:

$ echo $SHELL
/bin/zsh

如果您的默认终端是/bin/zsh (Z Shell)，就像我的情况(个人更喜欢Z Shell)一样，那么您应该在~/中设置这些环境变量。zshenv文件，内容如下(本例中设置JAVA_HOME环境变量，其他情况相同):

export JAVA_HOME="$(/usr/libexec/java_home)"

类似地，上面没有提到的任何其他终端类型，都应该在其各自的终端env文件中设置环境变量。

让我用我个人的例子，用一种非常多余的方式来说明。

First after installing JDK, make sure it's installed. Sometimes macOS or Linux automatically sets up environment variable for you unlike Windows. But that's not the case always. So let's check it. The line immediately after echo $JAVA_HOME would be empty if the environment variable is not set. It must be empty in your case. Now we need to check if we have bash_profile file. You saw that in my case we already have bash_profile. If not we have to create a bash_profile file. Create a bash_profile file. Check again to make sure bash_profile file is there. Now let's open bash_profile file. macOS opens it using it's default TextEdit program. This is the file where environment variables are kept. If you have opened a new bash_profile file, it must be empty. In my case, it was already set for python programming language and Anaconda distribution. Now, i need to add environment variable for Java which is just adding the first line. YOU MUST TYPE the first line VERBATIM. JUST the first line. Save and close the TextEdit. Then close the terminal. Open the terminal again. Let's check if the environment variable is set up.

在Mac OS上设置PATH环境变量

打开终端程序(默认在应用程序/实用程序文件夹中)。 运行以下命令

touch ~/.bash_profile; open ~/.bash_profile

这将在默认文本编辑器中打开文件。

ANDROID SDK为例:

你需要添加路径到你的Android SDK平台工具和工具目录。在我的例子中，我将使用“/Development/android-sdk-macosx”作为SDK的安装目录。增加如下一行:

export PATH=${PATH}:/Development/android-sdk-macosx/platform-tools:/Development/android-sdk-macosx/tools

保存文件并退出文本编辑器。 执行.bash_profile来更新PATH。

source ~/.bash_profile

现在，每次你打开终端程序，你的PATH将包括Android SDK。

echo $PATH

它输出当前路径值

然后执行vim ~/。Bash_profile并写入

export PATH=$PATH:/new/path/to/be/added

在这里，您将追加到旧路径，因此保留旧路径并将新路径添加到其中

然后做

source ~/.bash_profile

这将执行它并添加路径

然后再次检查

echo $PATH

Your .profile or .bash_profile are simply files that are present in your "home" folder. If you open a Finder window and click your account name in the Favorites pane, you won't see them. If you open a Terminal window and type ls to list files you still won't see them. However, you can find them by using ls -a in the terminal. Or if you open your favorite text editor (say TextEdit since it comes with OS X) and do File->Open and then press Command+Shift+. and click on your account name (home folder) you will see them as well. If you do not see them, then you can create one in your favorite text editor.

现在，添加环境变量相对简单，在概念上与窗口非常相似。在你的.profile中，每行添加一个变量名和它的值，如下所示:

export JAVA_HOME=/Library/Java/Home
export JRE_HOME=/Library/Java/Home

etc.

如果你正在修改你的"PATH"变量，请确保包含系统已经为你设置的默认PATH:

export PATH=$PATH:/path/to/my/stuff

现在是奇怪的部分，您可以打开一个新的终端窗口以使新变量生效，或者您需要键入.profile或.bash_profile来重新加载文件，并将内容应用到当前终端的环境中。

您可以在终端中使用“set”命令检查更改是否生效。只需输入set(如果您喜欢分页列表，可以再设置|)，并确保您添加到文件中的内容。

至于在GUI应用程序中添加环境变量，这通常是不必要的，我想听到更多关于你正在具体尝试做什么，以便更好地给你一个答案。