install Mac OS inventory agent

Can someone give the instruction how to install Mac OS inventory agent
correctly?

I have confirmed that MAC OS can resolve the DNS name of the ZCM
Inventory Server.

Based on one of posts here says:
When you run the installation from the package
available on your server for download (Configuration -> Download
ZENworks Tools -> Inventory Tools ->ZENworks_Adaptive_Agent_OSX.dmg), it
should launch TextEdit and ask you to PROVIDE this server name.

But I never see the popup asking for the server name.

I would appreciate it if someone can provide the help link or instruction.

Thanks a lot!