Whitelist on Cisco WLC

Hi,

I want to know the best way to create a MAC address whitelist for a specific WLAN. I have a list of my allowed MACs and i want to block everything else.

I saw MAC filtering but it doesn't seem fast to do and even if i do add the MAC in the mac filtering, is it considered a whitelist or blacklist.

I saw an option for ACL but can i use it for whitelist and call it in the WLAN.

thanks in advance.