Install Mac Digital Signage

Get sign.app and kioskdata.cnf

Log into your signage account and click on View Signage, and find the section "Create a Mac Digital Signage Player". Download and save the Mac Digital Signage application and your specific kioskdata.cnf. Be sure to select the appropriate "Playback For Location" at the top of the screen before downloading the kioskdata.cnf file.

Install both files in the same directory.

Using Finder or Terminal, create a folder in /Applications called StrandVision and copy the extracted sign.app file and kioskdata.cnf into that folder (/Applications/StrandVision).

Create a user to run the signage (optional)

Click the plus button

Then choose an admin account and give it a name (for example, "Signage").  Then click the Create User button.

For the signage to work, you may need to set the owner to the name of the account and the group to "admin" if the sign.app and kioskdata.cnf were put in the Applications directory while logged into another account.  To do this, open Terminal (in /Applications/Utilities), then type the following:
sudo   chown   –R   signage:admin   /Applications/StrandVision

Make it so the signage will start automatically after login

Make sure you’re logged into the account that you want your signage to play on.

Go into System Preferences   

Then Users and Groups  

Then click Login Items

Then click the plus button

And find Applications/StrandVision/sign.app and select it.

It should look like this now:

Change the Mac to start up without having to log in

Go into System Preferences   

Then Users and Groups  

Click Login Options

Click the lock and enter your administrator password

For the Automatic Login option
Change to the user you would like it to log in as, and type in the password when prompted.