Question: Apple ID not recognised after ssd installation
Today the old hard drive of my otherwise trustworthy Macbook Pro (first half 2011) has been replaced with an SSD. Lion was installed through Recovery. However, to install High Sierra I have to first install El Capitan, which requires me to login with my Apple ID to the App Store. Here comes the weird stuff: when trying to login, I get the warning that the AppleID or the password is not recognised. Weird, because it works perfectly on appleid.apple.com, and even stranger: I do get a verification code sent via SMS!!! Anyone know what's going on here? Thanks in advance!
Mac OS X (10.7.5)