Logs are the most effective and accurate resource to troubleshoot most of the issues you encounter with your Mac and macOS. Take into account that reading and interpreting logs requires more advanced skills and that it's commonly used by experienced support and administration technicians. However, you can still find clues about what could have gone wrong by following a log as it records a specific procedure, such as an installation, and identify key phrases, especially where the procedure stops and shows errors.
The Console app is where you will find all the logs for macOS, including installation, Wi-Fi, and system logs. You can also find diagnostics reports that have been generated by the system here. For example, you will find install.log, which helps troubleshoot installation issues. It shows details such as when and where an application, including macOS and its components, was installed or updated, if authentication was granted (when required), and the...