can I retrieve deleted text message on my computer for iPhone S4?

I personally don't believe they can be recovered. Although you could contact your cellular company to potentially retrieve things like that.

I assume you're wanting to recover deleted iMessages or SMS Texts from your iPhone via your iMac?

Could you clarify exactly what you're trying to do?

Also, do you backup your iPhone 4S to iCloud or Manually via iTunes at all? Or would you have a backup from around the time you know the device housed the messages in question?