How do I provide detailed information on multiple operating systems?

I am adding schema.org data to my site. I am looking at the details of the operating system. According to these specs: https://schema.org/operatingSystem , you can use values ​​like

Windows 7, OSX 10.6, Android 1.6

      

        
        
        
      

    

I am building a web application, so it supports almost all desktop OS that a modern browser can run. What value should I use? Can I use more than one value, in which case what should the markup look like?

<meta itemprop="operatingSystem" content="Windows" />
<meta itemprop="operatingSystem" content="OS X" />
<meta itemprop="operatingSystem" content="Linux" />

      

        
        
        
      

    

or

<meta itemprop="operatingSystem" content="Windows, OS X, Linux" />