I am unable to upgrade to Yosemite because when I press the "Free" button it takes me to a page where I must verify my billing info., then when I press done, it gives me "your payment method was declined" !!
Since it is free, why do I have to verify my billing info ? and if my account is verified why is it saying declined, does it try to take money out of my account ? and how then to install the new OS ?
Note: my current OS version is 10.9.5