[Szymon]

Hello,

Could you please check the following.

1. Make sure your D6000 dock is powered and connected to your Mac.
2. If macOS prompts to "Allow accessory to connect?" click "Allow".
3. Choose "About this Mac" from the Apple menu on the top left corner of your main screen.
4. Click on "More Info...".
5. Click on "System Report…".
6. The System Information application will open.
7. Select the USB information from the Hardware category

In my case I can see the dock listed:


What do you see in your case?

Regards,
Szymon