Mac users start I encountered unexpected problems on Thursday, including the time it takes to start the application for a few minutes, the entire macOS stall and unresponsiveness, and other problems. The problem seems to have started when Apple started to launch a new version of macOS Big Sur, but it affected users of other versions of macOS, such as Catalina and Mojave.
Other Apple services are also facing slowdowns, interruptions and abnormal behavior, including Apple Pay, Messages and even Apple TV devices.
Soon, some Mac users noticed that Trust (a macOS process that checks with Apple̵
Users who opened the console and filtered to find errors encountered many consecutive errors related to Trusted.
The affected hostname (actually just a pointer to a whole bunch of servers on the Apple CDN) is responsible for verifying all encryption certificates related to Apple, including certificates used for notarization of applications. Notarization was first introduced in Mojave and enforced in Catalina. Notarization is an automated process performed by Apple on software signed by developers:
Apple Notary Service is an automated system that can scan your software for malicious content, check code signing issues, and quickly return the results to you. If there is no problem, the notary service will generate a ticket for you to bind to the software; the notary service will also publish the ticket online where it can be found by Gatekeeper.
The “OCSP” part of the host name refers to “online certificate status protocol binding” or “certificate binding”. Apple uses certificate binding to help simplify the process of having thousands of Apple devices check the validity of thousands of certificates every day.
If the Apple device cannot connect to the network, but you want to launch the application anyway, the notarization verification should be a “soft failure”-that is, the Apple device should recognize that you are not online and allow the application to still be launched . However, due to the nature of whatever is happening today, calls to the server seem to hang rather than softly fail. This may be because everyone’s devices can still do DNS lookups on ocsp.apple.com without any problems, causing the devices to think that if they can do DNS lookups, they should be able to connect to the OCSP service. So they tried-and timed out.
The situation lasted for a few minutes. Although some temporary solutions were circulated on forums, chat rooms and Twitter, the problem behavior was eventually cleared because Apple may have solved the underlying problem.
Apple had previously announced that Big Sur would be released on Thursday, and the problem almost happened to start in time for the launch. We have contacted Apple to comment, and if we receive any statement, we will share it with you.
This story originally appeared on Ars Technica.
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