Update your software On your Mac, install the latest version of macOS. If you can't install the latest version of macOS, try to install OS X El Capitan 10.11. On your Windows PC, install the latest version of Windows and download the latest version of iTunes. Update your iPhone, iPad, or iPod touch to the latest version of iOS or iPadOS. Check Apple’s System Status for App Store. Whenever Apple’s servers face an outage, a number of features and services (i.e iCloud backup, iCloud Drive, App Store, Siri, etc.) are affected. So, if App Store is still not working on your device, it would be apt to check the system status of the App Store. MKbd.