Steamworks on Mac throws DllNotFoundException

Bumping this to see if anyone has any ideas. See the post here for the previous post on this subject.

I'm trying to get Lumosity's Steamworks to work on Mac. I followed the instructions for the Mac .bundle file and ran into the same problem that Majicpanda encountered:

...trying to build to OSX or using it on my MacBook with OSX isn't working either. Followed the PDF exactly for file structure and copied over the right libsteam_api.dylib to the project and still getting DllNotFoundException: SteamworksNative.​

Has anyone got Steamworks working on a Mac? If so, can you please post your solution. Thanks!

tldr; Followed instructions w/Steamworks notes, ran game in editor (4.5.1) and got the error "DllNotFoundException: SteamworksNative" stack trace below.

 DllNotFoundException: SteamworksNative
 ManagedSteam.Steam.RestartAppIfNecessary (UInt32 ownAppID)
 Steamworks.Awake () (at Assets/Plugins/Example Code/Steamworks.cs:70)