Q: Unable to synch Reminder on my Mac pro (OS X EI Capitan 10.11.2) to my iPhone 6 (iOS 9.2)

Hi raghuparakh,

If you need help with the Reminders app on your iPhone and your Mac Pro, the following resources may help:
 

Get help using Reminders in iCloud
https://support.apple.com/en-us/HT203520

 

Turn on iCloud Reminders and upgrade your software

• Choose Apple () > System Preferences, click iCloud, and select Reminders (or Calendar & Reminders on OS X Mountain Lion).
• Upgrade to the latest version of OS X that's supported by your Mac.

Check your Internet connection

1. Try to go to www.apple.com in Safari. If you can't connect to the Internet, your iCloud reminders won't update in the Reminders app. You can get help with your Internet connection.
2. Open a secure website from your iOS device to see if you can access ports 80 and 443. Reminders requires access to port 443 to push updates between iCloud and your devices.

Check your account details

Choose Apple () > System Preferences, and click iCloud. Make sure that you're signed in to the same iCloud account that you're using on your other supported devices.

Refresh your Reminders

If recent changes don’t appear, try to refresh both your calendars and reminders:

1. Open Calendar.
2. Choose View > Refresh Calendars.

Check your settings

After setting up iCloud Reminders, you might need to quit and reopen Reminders on your Mac. Then make sure that you set up your account correctly in Reminders:

1. Open Reminders.
2. Choose Reminders > Accounts.
3. Make sure that your iCloud account has the correct name in the Apple ID field.

Turn off iCloud Reminders and Calendar and turn them back on

1. Quit both Reminders and Calendar.
2. Choose Apple () > System Preferences, and click iCloud.
3. Deselect both Calendars and Reminders (or Calendars & Reminders on OS X Mountain Lion). On OS X Mountain Lion and Mavericks, click Delete from Mac.
4. Close System Preferences and wait about a minute.
5. Open System Preferences and choose iCloud.
6. Select both Calendars and Reminders (or Calendars & Reminders on OS X Mountain Lion).
7. Open Reminders.

Restart your computer

If you’re still having issues, restart your computer.

If you enable the Handoff feature on your iPhone and Mac, you can work seamlessly between the devices with most apps, including Reminders.

Use Continuity to connect your iPhone, iPad, iPod touch, and Mac
https://support.apple.com/en-us/HT204681

Handoff

With Handoff, you can start a document, email, or message on one device and pick up where you left off from another device. Handoff works with Apple apps like Mail, Safari, Maps, Messages, Reminders, Calendar, Contacts, Pages, Numbers, and Keynote. Some third-party apps are also compatible. 

Set up Handoff

• Check that you're signed in to iCloud with the same Apple ID on all of your devices. 
• Turn on Bluetooth on all of your devices and connect them to the same Wi-Fi network. 
• Make sure that your devices are near each other. 

Use Handoff

1. On one of your devices, open a compatible app, like Mail or Pages.
2. Use the app to start a task, like writing an email or a document.
3. Then you can switch to a different iOS device or Mac. If you switch to a Mac, you can press Command-Tab to pick up where you left off, or you can click the app icon in your Dock:
   
   
   
4. If you switch to a different iOS device, there are two ways to pick up where you left off:
    

 

You can swipe up from the bottom-left edge of the Lock screen, where you see the app’s activity icon  .

 

 

Or if you aren't on the Lock screen, double-click the Home button. On the multitasking screen that appears, tap the banner at the bottom of your screen.
 

 

Turn off Handoff

If you want to turn off Handoff on your iPhone, iPad, or iPod touch, go to Settings > General > Handoff & Suggested Apps. Then turn off Handoff.

On your Mac, go to System Preferences > General. Then uncheck the Allow Handoff setting.

Happy Holidays to you and yours!