How to update Billing info?

[shazra]

I'm stuck in a loop guys, please help.

Want to upgrade from Mountain Lion 10.8.5 to Mojave.
I am told I cannot do it directly, need to upgrade to El Capitan or High Sierra first.

When I go to download El Capitan or High Sierra from AppStore I get a message to update my BILLING INFO when I tap OK on that, I get a message I need to update my software first! It's a chicken and egg situation.

Pls advise what do I do and how?

Details of my computer:
iMac, Late 2012
Memory 8 GB
Software OS X 10.8.5 (12F2560)
Storage 200 GB free

Thanks a billion!

 

[chabig]

Try going to https://appleid.apple.com/ and updating your billing information there.