NSURLErrorDomain error -1012 App store
MacBook Pro 17" mid-2009 running MacOS 10.11.6 (last possible MacOS)
Recently a problem attempting to upgrade (and pay for) Etrecheck Pro revealed an underlying problem with online security certificates. Apparently it was more expensive to get a security certificate compatible with older Macs. Consequently the choice had been made to save money on the certificate renewal causing older Macs (including mine) to be unable to upgrade even though the payment had gone through.
A subsequent problem with my VPN and its diagnostic tool revealed the "NSURLErrorDomain error -1012" message. The VPN referred me to https://logi.wiki/index.php/ERR_CERT_INVALID as the solution to the problem. Following the script instruction in Terminal solved the problem with the VPN and this is a mechanism to automatically request the updated security certificate.
It simultaneously solved security issues with a good number of websites that had historically been secure and suddenly Chrome was behaving as though they were insecure. It also solved formatting issues on some websites. The online speeds also seemed to improve.
The Mac has subsequently been working without any of these problems until I came to try and access the App Store. I am able to login to AppleID without any problem.
Accessing the App Store from the Apple menu, produces the normal App Store window. However clicking on Updates ( of which there are two in queue) it returns the "NSURLErrorDomain error -1012" error message.
Since the potential for payment exists in the App Store, it is somewhat similar to the experience with Etrecheck Pro.
Accordingly, there is a suspicion that a security certificate associated with the App Store has not been updated to be compatible with older Macs although AppleID has.
Does anyone have experience/insights into this problem?