Automator 新建一个 Application
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添加一个动作 "Run AppleScript"
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代码如下

on run {input, parameters}

tell application "Finder"  
set selection to make new file at (get insertion location)  
end tell

return input  

end run

保存到 "应用程序"文件夹, 名字姑且叫 "New File.app" 吧.

Finder 工具栏右键, 自定义, 然后把 New File.app 拖上去, 大功告成,
<img src="//bbsmax.ikafan.com/static/L3Byb3h5L2h0dHBzL3BpYzEuemhpbWcuY29tLzM3ZTUyODAzNDJjMDljOTBmMDlmODgwZDg0ZWYxMjUwX2IucG5n.jpg" data-rawwidth="711" data-rawheight="442" class="origin_image zh-lightbox-thumb" width="711" data-original="https://pic1.zhimg.com/37e5280342c09c90f09f880d84ef1250_r.png">
需要时候点击一下, 即可在当前文件夹生成一个空文件.