To connect your Nikon D3200 to Lightroom using DSLR Camera Remote Server, follow these steps:
1. Open DSLR Camera Remote Server on your Mac.
2. Connect your Nikon D3200 to your Mac using a USB cable.
3. In DSLR Camera Remote Server, click on the gear icon in the top left corner and select "Preferences".
4. In the Preferences window, select the "Lightroom" tab.
5. Check the box next to "Launch Adobe Lightroom when camera is connected".
6. Click "Save" to save your changes.
7. Open Lightroom on your Mac.
8. In the top left corner of the Lightroom window, click on "File" and select "Tethered Capture" > "Start Tethered Capture".
9. In the Tethered Capture window, select your Nikon D3200 from the "Camera" dropdown menu.
10. Click "OK" to start tethered capture.
Your Nikon D3200 should now be tethered to Lightroom and you can start taking photos.