Donated lulz bot mini not responding to Cura

I had a guy give me a lulzbot a little over a year ago. When he handed it off he said it was in perfect working order I just needed to replace…. something. Can’t remember what it is now. I thought he said hot end… but I coul be wrong.
No matter I’m finally at a place where I can tinker with it and work out the bugs. A friend and myself wired the thing up and downloaded Cura. We plugged it in and verified that Cura is “seeing” the printer. After which I proceeded to try and get the thing to home. No luck. Turn on hot end. No luck. Turn on bed. No luck.
Anyways we can verify that when we pull the usb all the controls “grey out” so it appears to know that the printer is plugged in via usb but we can’t get it to
Any tips? We were working from a Mac book and as I understand it we don’t need any drivers.
I now this is an excruciatingly vague post but if you were in my shoes where would you start?

I have heard some issues with OSX not wanting to connect properly to our printers.

The following are instructions from our troubleshooting for linux, may be a similar problem.
Otherwise some of the options are using a different OS or using something like a raspberry pi with octoprint to connect and print to your machine. I would recommend the octoprint option even if you were not having an issue connecting to the machine, let me know if you want me to provide more information in support of octoprint.

If you have trouble connecting to your LulzBot 3D printer, you may need to add your user account to the dialout/tty serial access group. In a terminal, send the following commands:

> sudo usermod -a -G tty $USER

> sudo usermod -a -G dialout $USER

Thank you so much for your reply! We will give those a shot and report back to you.