I notice you’re looking for iTunes for macOS 10.13.99.
support.apple.com/downloads/itunesFor users on macOS 10.13.6, the latest version of iTunes available is version 12.8.3. itunes macos 10.13.99 download
This is the only safe and official way to get the version of iTunes compatible with your specific OS build. I notice you’re looking for iTunes for macOS 10
There is no official version of macOS numbered 10.13.99. The final and latest release of macOS High Sierra (version 10.13) is 10.13.6, which was released on July 9, 2018. Go to: support
It was a typical Wednesday morning for John, a freelance graphic designer working from his MacBook Pro. He was running macOS High Sierra 10.13.6, and his iTunes was due for an update. As he opened iTunes, the software nagged him to update to the latest version. John clicked on the "Update" button, only to be faced with an error message: "Cannot update. This version of iTunes cannot be updated. Please download iTunes 12.8 or later from the Mac App Store."
However, the act of finding this download highlights the fragility of digital ownership. Apple does not host old versions of iTunes publicly. If you navigate to Apple’s official support page for macOS 10.13 today, you will find security updates, not a monolithic iTunes installer. The average user seeking “iTunes for macOS 10.13.99” would be forced to wade through third-party archive sites (like OldVersion.com or Internet Archive), a landscape riddled with outdated certificates, broken code signatures, and potential malware. Even if a package labeled "iTunes_13.0_10.13.99.dmg" existed, macOS Gatekeeper would likely refuse to open it, citing a corrupted signature from a certificate that expired a decade ago.
Even when downloading the correct iTunes 12.8.3 for macOS 10.13.6, you might encounter issues. Here is the troubleshooting guide: