According to Appleinsider, on Friday, Apple released a supplementary update for macOS Mojave, which contains fixes for errors in previous security updates/Safari 14 updates.
According to the previous report, some users reported that macOS Mojave/Safari 14 update had some problems, including long system startup time, slow operation, high fan speed, and memory problems.
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These issues should be resolved in the macOS Mojave 10.14.6 update released by Apple on Friday. In addition, Apple has also re-released the Safari 14.0 update to macOS Mojave users, possibly with bug fixes related to the issues reported in the previous release. Currently, users can download and install macOS Mojave supplementary updates from the “System Preferences”.