If you're currently running Mac OS 10.11 or later on your Mac and syncing your iPhone with iTunes, you may receive a warning that "a software update is required to connect to your iPhone." Here's everything you need to know, what that means, how to update your system, and what to do if the upgrade does not work.
Why this warning appears on your Mac
In general, when the latest version is running on your Mac In the macOS version and on your iPhone, the latest available iOS version is running, this message should never appear on the screen Your laptop or desktop.
If your iPhone is running a newer version of iOS than the version of macOS you are running, you will not be able to sync your iPhone with iTunes if you receive a "Software update is required to connect to your iPhone" warning message , However, you can still charge your iPhone and use other tools such as image capture, photos, and more.
If you are not interested in updating your Mac iPhone to the latest MacOS, the answer can be painfully obvious. If you see the message "I need a software update to connect to your iOS device, would you like to download and install this update now?" prompt, just click "Install" to update the software needed to run your iOS device back to iTunes on an older MacOS version.
Another solution would be to open the App Store on your Mac, go to the Updates tab, and then update the system software to the latest version. If you are currently running macOS Sierra or lower, it is a good idea to update to macOS High Sierra. Most third-party app developers had plenty of time to make sure their applications work with High Sierra, so there should be no compatibility issues there.
If updating macOS, iTunes, and iOS to the latest versions still contains the above message, then you need to click "Install" to download and install the supported software from the Apple servers.
What to do if the update is not installed?
In some cases, the installation of the required update will hang and display an "Installation Failed" error after a reasonable amount of time has passed. In this scenario, it is likely that your iPhone will be running a developer beta or public beta software officially supported on the latest stable version of macOS.
Let's say you are running iOS 12 Developer Beta 3 or iOS 12 Public Beta 2. If this is the case and you are currently on the latest version of macOS High Sierra, this may be a problem. While Apple is usually pretty good at making sure their iOS betas are compatible with the latest stable version of macOS, they sometimes lose the ball.
(For me, I have recently had issues with macOS High Sierra 10.13.5 and macOS High Sierra 10.13.6 with my iPhone running the iOS 12 developer Beta 3.)
In this case, you need to run the latest beta version of macOS, which is for the iOS 12 beta for the MacOS Mojave 10:14 beta , Either that, or you need to downgrade your iPhone to the latest stable version of iOS.
If you do not want to jump to the latest macOS beta, but want to stay on the iOS beta, there's one more thing you can do – install the latest Xcode beta on your Mac. While non-developers are unlikely to benefit from Xcode, it may be necessary to have the iPhone synced to iTunes, unless you want to squeegee apps that can or must execute certain Linux-style commands. Installing Xcode Beta on Your Mac
Xcode, Apple's IDE (Integrated Development Environment) for developers of iOS and Mac apps, is freely available on the App Store . However, this is the latest stable version, not the beta version you need. To get the latest beta release of Xcode, all you have to do is access developer.apple.com/download and sign in with your Apple ID (you do not need to be a developer to do this).
Once you're there, just click on" Download "next to the latest Xcode Beta, in my case the Xcode is 10 Beta 3. The download will be a compressed XIP File, which is usually quite large, in my case over 5 GB. Once the download is complete, you must decompress the file, so double-click the XIP file in your Downloads.
This unpacks the archive into an application file that is about twice as large. In my case it was more than 11 GB. Be patient during this process as unpacking can take some time. Once it's done, you should end up with an "Xcode beta" app in your "Downloads". You can delete the XIP file to free up space on your Mac. If you have a stable version of Xcode, you may want to delete it now because two apps larger than 10 GB may not be required if you do not have enough disk space.
Now, just installing Xcode Beta is not good enough. You actually have to double-click on it. The first time you open it displays an option to install additional required components. Click on "Install". If iTunes is open, you must close it before proceeding. You must enter your password to continue. This too can take a while.
When the Welcome to Xcode window appears on your Mac, you're done. You can now quit Xcode and open iTunes. Your iPhone should now be visible to sync music or play. If you get the error again, repeat these steps to make sure you are running the latest Xcode beta. Overall, it's a good idea to install the Xcode beta until the official version of the Xcode or macOS version that has been tested is installed as a stable version.
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