Download of Mac Bulk SMS Software – Multi Device 10.3.2.5 was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This Mac application is an intellectual property of SendSMSMessages.net.
From the developer:
Apple Mac Bulk SMS Messaging Tool broadcasts unlimited text SMS by using GSM technology based mobile phones connected with Mac OS X installed PC. User can send text messages over national and international mobile networks in the form of standard SMS or notifications.
You may want to check out more software for Mac, such as Mac Send Bulk SMS Software for Android Mobile, Mac Bulk SMS Software for Android Phones or Mac Send Bulk SMS Software for GSM Mobile, which might be similar to Mac Bulk SMS Software – Multi Device.