Apple releases security updates for iOS, Mac
Apple released a slew of updates last week for both iOS and Mac. The new patches fix a number of critical security vulnerabilities and it is strongly recommended that you apply the updates and restart your devices as soon as practical.
To check for updates on your Mac, go to the Apple Menu, About this Mac, Software Update
On your iPhone, go to Settings, General, Software Update.
As always, make sure your backups are up to date as well!