Regex to match MAC address and also extract it's values

Regex to match MAC address and also extract it's values

I'm trying to first check if a string confirms the format of a MAC
address, and if it does I would like to extract all the byte values out of
the string.
So far I wrote this, and it successfully matches if the format of a mac
address is correct or not:
mac_regx = re.compile(r'^([0-9A-F]{1,2})(\:[0-9A-F]{1,2}){5}$',
re.IGNORECASE)
But when I use this regex to extract the byte values, I'm only getting the
first and the last one:
(Pdb) print(mac_regx.findall('aa:bb:cc:dd:ee:ff'))
[('aa', ':ff')]
I know I could simply split by : and that would do the job. I was just
hoping to be able to do both, the matching and value extraction, in only
one step with one regex.