Repairing file permissions on a Mac is good for your machine's health - so can be done regularly. Please follow the instructions below to repair the file permissions on your Mac:

Go to your applications folder and open the 'Utilities' folder.

Select 'Disk Utility' and click 'First Aid'.

Note: It is advised to back up your machine and files before running this.

The repair process will cycle through all files and correct permissions where incorrect. This process fixes faults that may slow down or hinder applications but which return no visible errors. For more information, please refer to the links below.

CNET: Speed Up Your Mac by Repairing File Permissions