Check Video Tutorial Below
In this video I'll show you how to auto start any program while booting on mac, First open up setting, then go to user & Groups, then select user.
Once you select click lock icon to unlock. enter your password & click unlock. Then go to login item & click + sign, now you can select any program you want to make auto start. You can also select multiple programs at once. Once it's done click the lock button.
Now you successfully made programs auto start. From now on all programs which you selected will auto start while booting up mac.
Video