/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ctags: illegal option — – │
usage: ctags [-BFadtuwvx] [-f tagsfile] file …

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ctags: illegal option -- -                                              │
usage: ctags [-BFadtuwvx] [-f tagsfile] file ...

# .zshrcにこちら入れました
alias ctags='/usr/local/bin/ctags'

参考記事

ctags error with mac