Remember: Never download executable files from random "iTunes download" websites. Stick to Apple-signed DMGs and community-vetted tools like Retroactive. Happy syncing

The most recent stable version of iTunes for older systems was generally .

Only download from reputable sources. Avoid "iTunes downloader" malware traps. The safest method is using Apple’s official support downloads (look for "iTunes 10.13.99 for macOS High Sierra") or verified archives like Internet Archive .

The version string "10.13.99" is almost certainly a typo or a colloquialism for the last compatible version of iTunes for the macOS High Sierra operating system. In the software world, "99" is often used as a placeholder for "the absolute last version before a major shift."

There is no official Apple release labeled "iTunes 10.13.99." If you are looking for the last version of iTunes to run on macOS High Sierra, you are looking for iTunes 12.9.5 .