Hello and welcome.
Since Macs do not have SIM card or cellular service, there isn't any way natively to send SMS messages. If you have an iPhone and are using the same iCloud on both devices, you can send SMS.
Skype offers SMS messaging within their application on a Mac, if you purchase a Skype Number.
I don't personally know of any Mac applications that can use a CSV to automate the sending of SMS messages in bulk. There are several online cloud-based solutions for that, but with a cost.
C