6.3 for Apple Watch series 2
Unable to upload 6.3 in the series to watch that Apple mailed me as a replacement.
Apple Watch
User profile for user:
srbwanderer
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Community Specialist
Hello Ipena2806,
WatchOS 6.3 should be the latest version available for a Apple Watch Series 2.
Based on the information found at Update your Apple Watch - Apple Support, there are a couple of ways to update the Apple Watch:
Get ready to update
Next, check these things:
1. Make sure that your iPhone is updated to the latest version of iOS.
2. Make sure that your Apple Watch is at least 50 percent charged.
3. Make sure that your iPhone is connected to Wi-Fi.
Keep your iPhone near your Apple Watch throughout the update. It could take from several minutes to an hour for the update to complete, so you might want to update overnight or wait until you have time.
Update your Apple Watch using your iPhone
You can wait until Apple Watch notifies you when a new update is available. Tap Update Tonight in the notification, then go to your iPhone to confirm that you want to update overnight. At the end of the day, leave your Apple Watch and iPhone charging overnight so the update can complete.
Or you can update your Apple Watch with your iPhone manually:
1. On your iPhone, open the Apple Watch app, then tap the My Watch tab.
2. Tap General > Software Update.
3. Download the update. If asked for your iPhone passcode or Apple Watch passcode, enter it.
4. Wait for the progress wheel to appear on your Apple Watch. It could take from several minutes to an hour for the update to complete.
Leave your Apple Watch on its charger while the update completes. Don't restart your iPhone or Apple Watch, and don't quit the Apple Watch app. When the update completes, your Apple Watch restarts on its own.
Update directly on your Apple Watch
If your Apple Watch has watchOS 6 or later, you can install updates without your iPhone:
1. Make sure that your watch is connected to Wi-Fi.
2. On your watch, open the Settings app.
3. Tap General > Software Update.
4. Tap Install if a software update is available, then follow the onscreen instructions.
Leave your Apple Watch on its charger while the update completes, and don't restart your Apple Watch. When the update completes, your Apple Watch restarts on its own.
Those steps should help update the Apple Watch Series 2 to the lasted WatchOS available.
Have a good day.