How to Sync iPhone to your Mac Wirelessly Using iTunes
Step 1. Connect your iPhone to your Mac with the help of USB cable.
Step 2. Double click on iTunes app to Open on you Mac.
Step 3. Click on the mobile device button on the iTunes.
Step 4. Go to the Summary tab.
Step 5. Check on the box next to Sync with this iPhone over Wi-Fi.
Step 6. And then click on apply.
Step 7. Now go to the settings on your iPhone.
Step 8. Go the general option
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Step 9. Under that you will find an option called iTunes Wi-Fi sync.
Step 10. Now going forward whenever you plug in the iPhone to power and switch on the Wi-fi, the content will automatically sync over Wi-Fi.