When iOS 11 launched, Apple released iTunes 12.7, which removed the App Store, preventing users from downloading or backing up apps on their computers. To address business needs, Apple released a special version: iTunes 12.6.3.6, which restores the App Store functionality.

With iTunes 12.6.3.6, users can:

Sync iOS devices running iOS 11 or earlier.
Back up apps and download them to a desktop.
Avoid prompts to upgrade to newer iTunes versions.

Important Notes:

This version cannot run alongside iTunes 12.7+, so older versions must be uninstalled first.

Libraries from newer iTunes versions aren’t compatible. Users can create a new library by holding Shift at launch or delete the old library from the Music folder.

Apple does not provide technical support for iTunes 12.6.3.6.

This release is mainly for enterprise users who need to deploy apps across multiple devices. While it restores functionality temporarily, long-term use may risk corrupted backups when syncing with modern iOS devices.

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