#MAC EL CAPITAN UPGRADE REVIEW MAC OS X#

Whether youРІР‚в„ўre running a server which relies on LetРІР‚в„ўs Encrypt certificates, or trying to connect your browser to one, the most helpful and information page on the subject is this one from Certify The Web. This not only affects Safari, but also third-party apps which use parts of WebKit to connect to websites. Full details are in this article, which explains what you can do to address that.

Versions from 10.12 (Sierra) to 12 beta (Monterey), and all recent versions of iOS and iPadOS may refuse to load an affected site, claiming that their intermediate and root certificates are out of date, despite the updated root certificate being present. This certificate expiry doesnРІР‚в„ўt only affect older versions of macOS.

#MAC EL CAPITAN UPGRADE REVIEW MAC OS X#

It may be possible to make changes within the root certificates to work around this: details are given in that article.Р”Р„lthough this specific problem shouldnРІР‚в„ўt affect any Mac which has been updated to a version of Mac OS X or macOS later than 10.12.2, all later versions of macOS are prone to a related problemРІР‚В¦ Although later versions of Mac OS X and macOS have had replacement root certificates installed, those arenРІР‚в„ўt in older versions of Mac OS X, nor in iOS prior to version 10. This is relied on by LetРІР‚в„ўs Encrypt security certificates. The reason, explained in full detail by Scott Helme, is that a widely used root security certificate, that for IdenTrust DST Root CA X3, will expire in just over a week, on 30 September. If youРІР‚в„ўre still running El Capitan, or any version of Mac OS X prior to 10.12.1, then youРІР‚в„ўre about to run into problems with some popular security certificates.

Mac el capitan upgrade review