使用以下命令行，Jazzy 有以下问题。已经检查了命令行工具等，一切看起来都不错。
$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
$ whereis xcrun
/usr/bin/xcrun
外壳命令/脚本
jazzy \
--clean \
--author Realm \
--author_url https://realm.io \
--github_url https://github.com/realm/realm-cocoa \
--github-file-prefix https://github.com/realm/realm-cocoa/tree/v0.96.2 \
--module-version 0.96.2 \
--xcodebuild-arguments -scheme,RealmSwift \
--module RealmSwift \
--root-url https://realm.io/docs/swift/0.96.2/api/ \
--output docs/swift_output \
--theme docs/themesJeffs-MBP-2:smallSDKSwift jefforthober$ jazzy \
> --clean \
> --author Realm \
> --author_url https://realm.io \
> --github_url https://github.com/realm/realm-cocoa \
> --github-file-prefix https://github.com/realm/realm-cocoa/tree/v0.96.2 \
> --module-version 0.96.2 \
> --xcodebuild-arguments -scheme,RealmSwift \
> --module RealmSwift \
> --root-url https://realm.io/docs/swift/0.96.2/api/ \
> --output docs/swift_output \
> --theme docs/themes
xcrun: error: unable to find utility "xcrun", not a developer tool or in PATH
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/open3.rb:211:in `spawn': No such file or directory - (Errno::ENOENT)
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/open3.rb:211:in `popen_run'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/open3.rb:99:in `popen3'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/open3.rb:279:in `capture3'
from /Library/Ruby/Gems/2.0.0/gems/xcinvoke-0.2.1/lib/xcinvoke/xcode.rb:86:in `xcrun'
from /Library/Ruby/Gems/2.0.0/gems/xcinvoke-0.2.1/lib/xcinvoke/xcode.rb:119:in `swift_info'
from /Library/Ruby/Gems/2.0.0/gems/xcinvoke-0.2.1/lib/xcinvoke/xcode.rb:57:in `swift_version'
from /Library/Ruby/Gems/2.0.0/gems/xcinvoke-0.2.1/lib/xcinvoke/xcode.rb:53:in `block in find_swift_version'
from /Library/Ruby/Gems/2.0.0/gems/xcinvoke-0.2.1/lib/xcinvoke/xcode.rb:44:in `each'
from /Library/Ruby/Gems/2.0.0/gems/xcinvoke-0.2.1/lib/xcinvoke/xcode.rb:44:in `each'
from /Library/Ruby/Gems/2.0.0/gems/xcinvoke-0.2.1/lib/xcinvoke/xcode.rb:53:in `select'
from /Library/Ruby/Gems/2.0.0/gems/xcinvoke-0.2.1/lib/xcinvoke/xcode.rb:53:in `find_swift_version'
from /Library/Ruby/Gems/2.0.0/gems/jazzy-0.5.0/lib/jazzy/sourcekitten.rb:136:in `run_sourcekitten'
from /Library/Ruby/Gems/2.0.0/gems/jazzy-0.5.0/lib/jazzy/doc_builder.rb:57:in `block in build'
from /Library/Ruby/Gems/2.0.0/gems/jazzy-0.5.0/lib/jazzy/doc_builder.rb:55:in `chdir'
from /Library/Ruby/Gems/2.0.0/gems/jazzy-0.5.0/lib/jazzy/doc_builder.rb:55:in `build'
from /Library/Ruby/Gems/2.0.0/gems/jazzy-0.5.0/bin/jazzy:15:in `<top (required)>'
from /usr/local/bin/jazzy:23:in `load'
from /usr/local/bin/jazzy:23:in `<main>'