Update software on your iPhone or iPad
On your Mac, you can update software on your iPhone, iPad, or an iPod touch.
Connect your device to your Mac.
You can connect your device using a USB or USB-C cable or using a Wi-Fi connection. To turn on Wi-Fi syncing, see Sync content between your Mac and iPhone or iPad over Wi-Fi.
In the Finder on your Mac, select the device in the Finder sidebar.
Select General in the button bar.
Click Check for Update.
To install an available update, click Update.