【ruby出错】麻烦大家一起帮忙解决一下，谢谢🙏

dyld: Library not loaded: /usr/lib/libruby.1.9.1.dylib
Referenced from: /usr/bin/ruby
Reason: no suitable image found. Did find:
/usr/lib/libruby.1.9.1.dylib: mmap() error 22 at address=0x00329000, size=0x00004000 segment=__DATA in Segment::map() mapping /usr/lib/libruby.1.9.1.dylib
/usr/lib/libruby.1.9.1.dylib: mmap() error 22 at address=0x00979000, size=0x00004000 segment=__DATA in Segment::map() mapping /usr/lib/libruby.1.9.1.dylib
Trace/BPT trap: 5
说不能加载libruby，但是我看文件在lib下面。
望高人指点，不知道是不是不兼容呢？