To fully uninstall PreVeil from Mac, you can use the following steps:
Open Finder.
Click on Applications on the menu on the left.
Click on the PreVeil application folder.
Navigate to the uninstaller folder.
Double click on PreVeil Uninstaller.app.
When the pop-up box appears, check off the box to Delete my Private Keys, and then click on the Uninstall PreVeil button.
Go back to Finder, and either select your home folder from the Favorites menu, if it’s listed there.
If it’s not, then while in Finder, select Go from the Mac menu bar, and click on Home from the drop down list.
Delete the PreVeil folder located there.
Open Trash, right-click on the PreVeil folder you just deleted, and select Delete Immediately.
Click the Delete button in the pop-up box that appears.