Sometimes the watchOS software update cannot be installed on Apple Watch. While a poor internet connection is often the main culprit behind the unfortunate software update installation on Apple Watch, congestion and system errors are no less responsible. Going this route, the very first thing I do to fix the "Unable to download and install watchOS software update" issue is to delete the Apple Watch software update file. More often than not, that does the trick for me to sort out the problem. Let me show you how it works:
How to remove watchOS 8 software update file on Apple Watch
You can remove the watchOS software update from both the Apple Watch and the paired iPhone via the Watch app. So, if the software update installation has failed on your Apple Watch, follow along to get rid of it so you can go to the fresh installation.
2. Now click on General.
3. Then click Usage.
