After downloading & unzipping your presets folder, navigate to it, open the folder, and copy & paste the entire folder (not the individual presets) and navigate to the following path to get to your “Develop Presets” folder: user folder (this will be the one with a little house next to it)/Library/Application Support/Adobe/Lightroom/Develop Presets. Paste the entire folder containing your presets into the “Develop Presets” folder. There will likely be another folder that says “User Presets” right next to it (those are LR’s default presets) or you may have additional presets there as well. Launch Lightroom and navigate to your presets are within the “Develop” module. These will be located on the left hand side of the screen.
Download the .lrtemplate files in the designated folder. Unzip the file. If you encounter an “encryption” prompt, press yes (do this for each file if necessary.) Open Lightroom, press the develop tab. On the left hand side in the Presets section click on your preset arrow/tab and this will drop down the preset user area. Right Click in the user preset area then choose import. Navigate to the .lrtemplate file (presets) in the folder you saved them in. Select the presets and press import. The presets should automatically insert into your preset list.