The 3.0.68 version of HitEmUp for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This free Mac app is an intellectual property of Zakery Kline. The application is included in Communication Tools.
From the developer:
Hit Em Up lets you mass text from all your favorite devices. You can send personalized mass text and bulk SMS on iMessage, WhatsApp, and Email. Though you send in bulk, the recipients can't see who else you text to. However, the replies go back only to you.
You may want to check out more software for Mac, such as PhoneAmego, PastebotSync or ScreenHaven, which might be similar to HitEmUp.