How to sync the iPad and iPhone in macOS Catalina?

To sync data across your iPhone and iPad, we assume you haven’t set up at least one of the two devices yet. If both devices are already set up, you’ll need to erase your iPhone or iPad using a factory reset and then sync through an iCloud backup.How to Factory Reset Your iPhone and iPadHow to Factory Reset Your iPhone and iPad Wondering how to factory reset your iPhone or iPad? Here’s how to back up, reset, and restore your iOS device’s data easily,

To get started with syncing, make sure your devices are on the same Wi-Fi network. You’ll also need an up-to-date backup on iCloud.

Sync or remove content using iTunes

1. Open iTunes and connect your device to your computer with a USB cable.
2. Click the device icon in the upper-left corner of the iTunes window. Learn what to do if you don’t see the icon. 
3. From the list under Settings on the left side of the iTunes window, click the type of content that you want to sync or remove.¹ To turn to sync on for a content type, select the checkbox next to Sync.
   
4. Select the checkbox next to each item that you want to sync.
   
5. Click the Apply button in the lower-right corner of the screen. If syncing doesn’t start automatically, click the Sync button.
   

You can only sync your iOS device with one iTunes library at a time. If you see a message that your iOS device is synced with another iTunes library, your iOS device was previously connected to another computer. If you click “Erase and Sync” in that message, all content of the selected type on your iOS device will be erased and replaced with content from this computer.

Sync your content using Wi-Fi

After you set up syncing with iTunes using USB, you can set up iTunes to sync to your device with Wi-Fi instead of USB. Here’s how:

1. Connect your iOS device to your computer with a USB cable, then open iTunes and select your device. 
2. Click Summary on the left side of the iTunes window. 
3. Select “Sync with this [device] over Wi-Fi.” 
4. Click Apply.

When the computer and the iOS device are on the same Wi-Fi network, the iOS device appears in iTunes. The iOS device syncs automatically whenever it’s plugged in to power and iTunes is open on the computer.