To change app permissions on your Mac, open the Apple menu, click System Preferences> Security & Security> Privacy, click a service, and then select or deselect the check box to grant or deny access to the service for the applicable application.
Steps

Step 1. Open the Apple menu
Click on the Apple logo in the upper left corner.

Step 2. Click System Preferences

Step 3. Click on "Protection and Security"
This option is marked with a house icon.

Step 4. Click on Privacy

Step 5. Click on the service in the left pane
This pane displays the services that the applications listed in the right pane can run on.
For example, the Geolocation service on the left might work with the Maps app on the right because Maps uses geolocation to determine your location

Step 6. Check the box next to the application to add or remove permission
Apps that have a blue checkmark next to them have permission to use the services shown in the left pane.
- If there are no applications, no application is running with this service.
- If you are unable to select the checkbox, click on the lock-shaped icon in the lower left corner.
- Enter password.
- Click Unblock.

Step 7. Click on the red "x" symbol
The changes made will be saved.
Advice
- Some services, such as Accessibility, let you add or remove permissions directly from the Privacy window.
- To add an application, click +, in the left pane of the pop-up window, click Programs, click the application, and then click Open. Click - to remove the app from the Accessibility permission list.