I have an Apple 2011 laptop. I haven't done any recent updates and nor have I downloaded anything either. My computer needs to upgrade to the next OS but it is saying that a change has to be made to my iCloud settings before I can use my App Store. I have no idea what this could mean.
I tried upgrading my credit card info on my Apple account and rebooting the laptop, to no avail. I also deselected some of the items in iCloud, but to be really honest am less familiar with Macs than PCs.
What do I need to do so I can upgrade my Mac?