The command "auvaltool -a" is used to perform a validation test on Audio Unit (AU) plugins installed on a macOS system.
Here's a breakdown of the command:
"auvaltool": It is the name of the command-line tool provided by Apple for audio unit validation.
"-a": It is an option or flag passed to the tool, which specifies that the full validation test should be performed on all available audio unit plugins.
By executing this command, the "auvaltool" will scan and test all the installed audio unit plugins against a set of specified requirements and standards. It ensures that the plugins are working correctly, have the required capabilities, and are compatible with the system.
The output of the command will display the result of the validation test for each audio unit plugin installed on the system.