Step 1 : Take an ethernet cable and connect your mac to the router.
Step 2 : Now, navigate your web browser to “192.168.1.1” in the address bar. A login box prompting you to enter the username and password will open in front of you. set the username as admin and leave the password field blank.
Step 3 : Now Dlink Setup page will open on your system’s screen. Choose manual setup and go to advanced > Network filter.
Step 4 : Select "Turn mac filtering ON and allow computers listed to access the network". Type your mac address in the blank pass field and click on save to apply your changes.
Step 5 : Your Dlink router is now configured with mac.
Once into the router you have do some setup depending on if you are using the wireless or not. What security options to use. Also you may need to setup you Mac to use DHCP which it likely already is unless you changed it.
Open Safari and type into the address bar https://192.168.1.1 This will take you to the router setup ware.
To get past the first screen type admin and admin again for the password.
Now I'm not sure where that software will take you but somewhere in there you will need to supply three pieces of information:
You may need to select manually configure to get to the place where you can enter the following information.
--> Your ip's address-https://your.isp.name
--> Your username that you have with your isp
--> You password that you have with your isp
If your having difficulty making these settings then your best talking to your ISP or D-link support as it is not nothing to do with the Mac. So assuming you are successful entering this information then: Click OK or connect whatever the affirmative button is and if all goes well the software should indicate as much.