Mac OS X 11中的/usr/bin 的“Operation not permitted”

找到class-dump所在的目录，比如~/Desktop/class-dump,使用命令：

cd ~/Desktop

使用如下命令将class-dump拷贝到目录/usr/bin:

sudo cp -f class-dump /usr/bin

执行命令后，提示如下：

cp: /usr/bin/class-dump: Operation not permitted

原因：OSX 10.11之后在配置class-dump的时候，会发现要将class-dump，copy到目录/usr/bin不被允许，权限问题。

解决办法:

1.打开Terminal，输入mkdir ~/bin，在当前用户根目录下创建一个bin目录；

2.把class-dump给拷贝到这个目录里，并赋予其可执行权限：mv /path/to/class-dump ~/bin; chmod +x ~/bin/class-dump；

3.打开~/.bash_profile文件：vi ~/.bash_profile，在文件最上方加一行：export PATH=$HOME/bin/:$PATH，然后保存并退出（在英文输入法中依次按下esc和:（shift + ;，即冒号），然后输入wq，回车即可）；

4.在Terminal中执行source ~/.bash_profile；

上面的操作把~/bin路径给加入了环境变量，测试一下：

 ~/ class-dump
class-dump 3.5 (64 bit) (Debug version compiled Jul  6 2017 22:22:07)
Usage: class-dump [options] 

  where options are:
        -a             show instance variable offsets
        -A             show implementation addresses
        --arch   choose a specific architecture from a universal binary (ppc, ppc64, i386, x86_64, armv6, armv7, armv7s, arm64)
        -C      only display classes matching regular expression
        -f        find string in method name
        -H             generate header files in current directory, or directory specified with -o
        -I             sort classes, categories, and protocols by inheritance (overrides -s)
        -o        output directory used for -H
        -r             recursively expand frameworks and fixed VM shared libraries
        -s             sort classes and categories by name
        -S             sort methods by name
        -t             suppress header in output, for testing
        --list-arches  list the arches in the file, then exit
        --sdk-ios      specify iOS SDK version (will look for /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk
                       or /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk)
        --sdk-mac      specify Mac OS X version (will look for /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
                       or /Developer/SDKs/MacOSX.sdk)
        --sdk-root     specify the full SDK root path (or use --sdk-ios/--sdk-mac for a shortcut)
 ~/