Rarely, if you have attempted to open a package installer or disk image on the Mac, you may find a stuck “Verifying” window, and you may also notice a task called CoreServicesUIAgent taking up a lot of system resources in Activity Monitor. This verification process is normal, but CoreServicesUIAgent getting stuck is not, so let’s fix that.

Sometimes it can take a while to verify a package or DMG file, so you should generally let this process complete. But sometimes it gets stuck and pegs CPU for an extended amount of time and doesn’t seem to be moving…