You may receive an alert if you are running macOS 10.11 on your Mac, and you connect your iPhone to sync to iTunes. update it. This also happens whenever you try to connect an iPhone, iPad to a Mac. The iPhone, iPad is not correctly connected, and you get an alert like this:

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It is necessary to update your computer software in order to join your iPhone. So you click Install. But after a while you’re left with an additional alert:” Installation failed: ” It is not possible to install the program because it’s not available on the server hosting the software

Fix The Error For Software Update is needed to connect to your iOS Device

The reason you’re getting the message “a software update is required to connect to iPhone” is because your iPhone runs a higher-end version of iOS that macOS running on your computer cannot support. Therefore, your iPhone is recognized by iTunes or Photos but it isn’t able to sync to iTunes. Because macOS isn’t fully compatible with the iOS version your iPhone is running, in order to get your iPhone to work with iTunes, it is recommended that you:

• Download the most recent version of macOS that is compatible with your Mac. For instance, if you are running macOS 10.13 High Sierra, upgrade to macOS 10.14 Mojave.
• Make sure you update Your iTunes up to the most recent version.

After you have updated macOS and iTunes After, connect the iPhone, iPad again and check if it works using iTunes without the alert for software updates. If you’re macOS, iTunes is up-to-date; however, a software upgrade is required for connecting to iPhone and iPad; there is no other choice than to click Update to install the latest software update. If the update failed because it’s not accessible from the update server for your software, you will need to try other options.