Recent update to itunes broke
I have an older iMac (Early 2009) running El Capitan. A few days ago I updated iTunes and now iTunes, Messages and the AppStore do not work. I get an error about the init.itunes.apple.com not being valid. I went through all my certs and saw no blue dotted ones etc... tonight, I went to https://init.itunes.apple.com and looked at the certificate, and it is expired.
Any suggestions on how to correct this issue?