Quest 2 with iMac + Shadow VR not showing up

I can’t connect anything from iMac computer to  Shadow.

I tried connecting my phone but my iMac is picking it up.

I really want to play VR but my experience on trying every possible way to connect, was bad. 
I paid $20 for the virtual Desktop thing, I downloaded side quest, I did everything (I hope) correctly. :( I wish there was a good guide.

im on iMac computer (2014 model) 

I have a 3.1 usb wire for my Quest 2 from Amazon.

I have 5Ghz internet.

im seeing YouTubers playing VR and I’m jealous.

can someone help me me?