If the automatic installation wouldn't work, or if you are running on macOS 10.6 or 10.7, download the Photomatix Pro 6.1 for Mac app directly (i.e. without an installer - you will just need to drag the Photomatix Pro 6 app to your Applications folder).You may also download that Photomatix Pro for Mac app if you prefer to install manually or in case the automatic installation wouldn't work.
If you haven't taken bracketed photos yet, you can download some on the exposure bracketed photos samples page.
The Photomatix Pro download includes the Plugin for Lightroom. If Adobe Lightroom is installed on your computer, the installer will also install the Plugin that lets you use Photomatix Pro from Lightroom.
For more information, see the Photomatix Plugin for Lightroom page.
See how to set up Automatic Exposure Bracketing (AEB) on various camera models.
For tips and other useful information, see the Photomatix FAQ.
The User Manual is available from the Help menu of Photomatix Pro, but you can also access it online here:
Lightroom Plugin for Photomatix Pro 4.2.7 (updated for compatibility with Lightroom CC)