Availability macOS Big Sur was accompanied by app launch problems – Computer – News

Apple released macOS Big Sur on Thursday evening, but the release caused server problems at the company. As a result, users were unable to launch apps, or were slow to launch apps, even if they were still running an older version of macOS.

Such as announced on Tuesday Apple made macOS Big Sur, version 11.0 of the operating system, available Thursday. Along with that introduction, various problems arose at Apple. For example, Apple Pay, Card, Messages, Maps and Apple TV devices had to deal with malfunctions, writing Ars Technica in AppleInsider.

The most common problems were that users were unable to launch apps on macOS, or that apps were slow to start. That problem was not limited to users who had upgraded to macOS Big Sur, users with previous operating systems also experienced app problems.

The problems could be traced to the way Apple validates apps, Mac developer discovered Jeff Johnson by using the Little Snitch network tool. MacOS performs this validation by means of the trustddaemon. This is a process that has been in Apple’s operating system since version 10.12 Sierra, which runs in the background and which manages and verifies certificates. As of macOS Catalina notarization mandatory for app developers and the certificate check is part of this, as is a check for malicious content. The daemon communicates with ocsp.apple.com, where oscp stands for Online Certificate Status Protocol.

It worked with the release of Big Sur trustd not to get in touch with ocsp.apple.com which led to slow startup of apps. Because dns lookups on ocsp.apple.com succeeded, the apps kept trying. Without an internet connection, the apps would start normally and also trustd blocking in the firewall would work were it not for the daemon in the ContentFilterExclusionList is included, writes security researcher Patrick Wardle, and firewalls can no longer block them.

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