Apple has released a slew of updates recently. macOS 10.14.6 offers several bug and security fixes. You can download it by choosing "System Preferences" from a Mac's Apple menu, then clicking "Software Update." iOS 12.4 boasts performance improvements. For older iPhones and iPads, iOS 9.3.6 and 10.3.4 has been released. If your iOS device can’t upgrade to the latest versions of the operating system, this is your best option.
You can download the iOS upgrades by going to the Settings > General, then Software Update, and following the instructions.
watchOS 5.2.1 restores the Walkie-Talkie feature. You can nab it by going to the Watch app on your iPhone and selecting General > Software Update.
Apple has posted tvOS 12.4 for the Apple TV HD and Apple TV 4K. It’s a maintenance upgrade. As is tvOS 7.3.1 for the third generation set-top box.
If your Apple TV doesn’t update automatically, you can go to the home screen, go to Settings and choose Update Software under Software updates.