Hello @Leo Pure Electric,

Although you can designate email content to show on certain devices such as desktop or mobile, you wouldn’t be able to further target based on the OS (operating system) your recipients are reviewing the email from. 

One way this would be accomplishable would be if you were already collecting this OS data from your recipients and previously stored as a custom profile property. With this information collected, you can leverage the show/hide function to display if a recipient meets this show/hide criteria of having this particular custom profile property. 

To learn more about this work around, I recommend taking a look at our How to Show or Hide Template Blocks Based on Dynamic Variables Help Center article and some Community posts that discuss this topic. I’ve included some below that I think may help you:

I hope this helps!

David

Gotcha. Thanks

Leo