First, head to your Applications folder. Highlight Topaz DeNoise 6.app and Right-Click or hold Control + Click, and select the Show Package Contents menu option.
Navigate to /Contents/Resources/ and copy the Topaz_denoise6.plugin file.
Next, navigate to your Photoshop Plug-ins folder. In this example, we'll use Photoshop CC 2015's default Plugins directory. Then, create a new folder, and name it TopazDeNoise6.
Photoshop CC 2015: /Applications/Adobe Photoshop CC 2015/Plug-ins/
Photoshop CS4, CS5, CS6: /Applications/Adobe Photoshop CS/Plug-ins/
Photoshop Elements 12, 13, 14: /Applications/Adobe Photoshop Elements/Support Files/Plug-ins/
The exact path will depend on which version of Photoshop you have installed.
Paste the Topaz_denoise6.plugin file you copied, into the newly created TopazDenoise6 folder, and launch Photoshop. If Photoshop is already open, shut it down and restart it. You're ready to edit!
First, head to the default DeNoise 6 install directory, and find the folder where your plugin file resides:
32bit Host Editors - C:\Program Files\Topaz Labs\Topaz DeNoise 6\PS_Plugins\
64bit Host Editors - C:\Program Files\Topaz Labs\Topaz DeNoise 6\PS_Plugins_x64\
*DeNoise 6 does not support 32bit OS, only 32bit host editors running on a 64bit OS
Copy the preset file. In this example, we are using the 64bit plugin, so we will copy tldenoise6ps_x64.8bf.
Navigate to your Photoshop Plug-ins folder. Since we are using Photoshop CC 2015 64bit, the path we are using is below:
C:\Program Files\Adobe\Adobe Photoshop CC 2015\Plug-ins\