Windows and Mac installers are different. Which version of Dreamweaver did you buy? I ask because legacy Creative Suite software is discontinued, no longer sold or supported. Use at your own risk.
CS1, CS2 and CS3 are officially dead. They cannot be activated because the aging activation servers were retired and taken offline many years ago. Even if you have a proper installer for Win/Mac) and compatible serial number, it's useless.
CS4, CS5 and CS6 can still be activated if you have the original installation disks for Win/Mac, an optical reader, a legitimate serial number and an older operating system that can support 32-bit apps.
However, legacy Creative Suite installers won't work on macOS Sierra, High Sierra or Mojave without terminal workarounds.
============= Beware of fake Adobe reps who may contact you privately offering to sell you software or take control of your computer. It's a scam, run away! ============= 3 Easy Ways to Identify Genuine Adobe Staff https://tinyurl.com/10791730
Nancy O'Shea, Adobe Product User & Community Professional Alt-Web Design & Publishing ~ Web : Print : Graphics : Media