Guess I spoke too soon. Now I can't get it to connect no matter what I do. I truly hate this...
I currently don't use WP8, but when I had bought WP7 Lumia 710 for my dad and tried to use with the previous WP MAC connector on my mac, didn't have any problems
when I tried at-least a dozen times in a week or so before handing off the phone to my dad.
Seems MS has replaced the MAC app for WP8. Are you using the usb cable provided by Nokia?
Also when you plug the Nokia to MAC do you already have WP MAC app open? Try both ways: With and without open.
Next, if not working, go to Apple Symbol on top left > About this MAC > More Info > System Report > Hardware > USB .
Check if Nokia is showing up anywhere in the list of usb devices?
If it doesn't show up there then I am sure MAC App also can't detect it.
If it shows up there but MAC app can't detect it then it is most likely the app/app's usb driver/phone firmware issue.
Another way to confirm that is to use it with other MAC and Windows computer and see if there is any pattern of failure.
Also sometimes it can be usb cable problem too. Change that and try.
Let me know what you find out. (I am interested in picking up 1020 after couple of months and I exclusively use MAC, so would be good to know about these issues)