How to change credit card details on iMac 10.13.6

Hi, the online website only allows making payments, scheduling payments, adding accounts to be used for payments and downloading monthly statements as pdf. A few other limited functions are also available.

You can edit some settings and features through the Apple Card in the Wallet App on your iPhone. If you don’t have an iPhone, you can borrow one (friend, relative?) and ask them to log out of their Apple ID and then you can log in with your Apple ID.

Once logged in to your Apple ID you can make the necessary changes. Here’s an Apple Support article on Apple ID’s,

https://support.apple.com/en-us/HT208242

Here’s a link to help with contacting Apple/Goldman Sachs Support Team if you can’t make the changes you need,

If you need more help, chat with an Apple Card specialist.

I hope this helps.

You need to be much more specific. If you have the CC info saved on a website you need to edit on the site.

I would recommend that you start by reading Writing an effective Apple Support Communities Question so you can get an idea of what we need from you in order to assist you.